Smallest and easternmost of the Greater Antilles, Puerto Rico is bounded by the Atlantic Ocean on the north and the Caribbean Sea on the south. Mona Passage to the northwest separates the island from the Dominican Republic, and the Virgin Islands lie to the east. Puerto Rico is crossed by mountain ranges, notably the Cordillera Central, which rises to 4,389 ft (1,388 m) in the Cerro de Punta. Although rivers are short and unnavigable, some provide irrigation or hydroelectric power. The climate is mildly tropical, with little seasonal change. Rainfall is plentiful, despite some arid regions in the south. Hurricanes are likely to occur between August and October. In addition to the capital, other important cities are Ponce, Caguas, and Mayagüez.
Puerto Rico's fertile soil supports one of the densest populations in the world. The Puerto Ricans are descended from Spanish colonists and also from Africans and Native Americans. Spanish and English are the official languages, although Spanish is predominant. Roman Catholicism is the main religion. Spanish is the medium of instruction, but English is studied as a second language by all students. Institutions of higher learning include the Univ. of Puerto Rico (with its main branch at Río Piedras), Inter-American Univ. at San Germán, Catholic Univ. at Ponce, and a Catholic college for women at San Juan.
Manufacturing replaced agriculture as the greatest contributor to Puerto Rico's national income largely because of "Operation Bootstrap," which from the 1940s attracted U.S. firms to the island through the use of tax exemptions and duty-free access to the United States. Pharmaceutical, electronics, and apparel industries have been the most important, along with food processing, oil refining, and the manufacture of machinery and chemicals. Livestock raising (for meat and dairy production) has surpassed the growing of sugarcane as the chief agricultural pursuit in Puerto Rico. Coffee, pineapple, plaintains, and bananas are other leading crops. Reforestation has been undertaken to restore tropical woods in the interior, where the Caribbean National Forest is set apart. Tourism is also a major source of revenue, as is money remitted by Puerto Ricans (about 2.7 million) living in the United States.
The United States is by far Puerto Rico's chief trading partner. The leading exports include pharmaceuticals, electronics, apparel, canned tuna, rum, beverage concentrates, and medical equipment. Imports include chemicals, machinery and equipment, clothing, food, fish, and petroleum products. Although Puerto Rico has the most diversified and powerful industrial economy in the Caribbean, significant population growth and insufficient jobs have contributed to social and economic problems and to continued emigration.
Puerto Rico's governor and both legislative houses are popularly elected for four-year terms. There are 27 senators and 51 representatives. An elected resident commissioner serves a four-year term in the U.S. House of Representatives but cannot vote. On the local level, Puerto Rico is divided into municipalities, each with its own mayor and assembly. Puerto Ricans share all the rights and obligations of U.S. citizenship, including service in the armed forces; however, they do not pay federal taxes and cannot vote in national elections. The U.S. government handles Puerto Rico's foreign affairs, and U.S. military installations are maintained on the island.
Before the Spanish arrived the island was inhabited by the Arawak people, who called the region Borinquén or Boriquén. Christopher Columbus visited the island in 1493 and named it San Juan Bautista [St. John the Baptist], but he sailed on to Hispaniola to plant a settlement. Juan Ponce de León began the actual conquest in 1508, landing at San Juan harbor, which he called Puerto Rico [Span.,=rich port]. A settlement was founded in 1521 on the site of present-day San Juan. As hardship, disease, and Spanish massacres eliminated the Arawaks altogether, they were replaced as plantation workers by African slaves, first introduced in 1513. Deposits of placer gold were virtually depleted during the 1530s, after which the Spanish devoted their full attention to the sugar plantations.
Raids by the nearby Carib and by British, French, and Dutch pirates, however, hampered agricultural prosperity. San Juan, meanwhile, became a leading outpost of the Spanish Empire. Treasure-filled Spanish galleons that anchored there on their long trip to Spain attracted buccaneers. George Clifford, earl of Cumberland, held Puerto Rico for five months in 1598, and the Dutch besieged the island in 1625. Spain's response was to build several fortresses (whose walls still stand) that made San Juan virtually impregnable. Coffee was introduced in the 18th cent. to supplement sugar.
Beginning in the 1820s there were some uprisings against Spanish rule, but all were put down. Most notable was the Lares rebellion (Grito de Lares) of 1868. As part of a Spanish reform movement that extended to Puerto Rico, slavery was abolished in 1873, and the new Spanish republican constitution of 1876 granted Puerto Rican representation in Spain's parliament.
A movement for self-government, supported by liberal groups in Spain, grew in Puerto Rico during the 1880s. Finally, in 1897, largely through the efforts of the Puerto Rican statesman Luis Muñoz Rivera, Spain signed a charter granting the island some autonomy. The new form of government had little chance to operate, however, for a few months later the Spanish-American War erupted. U.S. troops landed at Guánica on July 25, 1898, and occupied the island without much difficulty. By the Treaty of Paris (Dec. 10, 1898), which ended the war, Puerto Rico was ceded to the United States.Puerto Rico and the United States
Puerto Rico remained under direct military rule until 1900, when the U.S. Congress passed the Foraker Act, setting up an administration with a U.S. governor, an upper legislative chamber appointed by the U.S. president, and an elected house of delegates; the U.S. Congress was given the right to review all legislation. Meanwhile, a movement for Puerto Rican independence gained strength as pressures to define the island's political status grew. In 1917 the Jones Act stipulated that Puerto Rico was a U.S. territory whose inhabitants were entitled to U.S. citizenship. The act provided for election of both houses of the Puerto Rican legislature, but the governor and other key officials were still to be appointed by the U.S. president, and the governor was empowered to veto any legislation.
During World War I, U.S. holdings in Puerto Rico increased, and the change to a one-crop economy was completed. The island's territorial status gave Puerto Rican sugar a ready market within U.S. tariff walls; however, large corporations encroached on land where foods had been raised for subsistence, thus causing social upheaval in the countryside and necessitating greater food imports. Absentee ownership and one-crop culture aggravated the ills of overpopulation. Sanitary and health improvements under the U.S. occupation further accelerated population growth. Many Puerto Ricans criticized the American regime for its menace to the Hispanic roots of Puerto Rican culture. Criticism intensified when the sugar market dropped in the 1930s and many workers, always near the edge of starvation, became even more desperate.
Recovery measures were taken during the presidency of Franklin Delano Roosevelt and especially under the governorship (1941-46) of Rexford G. Tugwell. Military activities related to World War II also aided the economy. The Popular Democratic party, headed by Luis Muñoz Marín, adopted a program based on economic reform and expansion, but other political parties were more concerned with U.S.-Puerto Rican relations. The Conservative Republicans advocated statehood; the Independentists, led by Gilberto Concepción, and the Nationalists, headed by Pedro Albizu Campos, favored immediate independence.The Postwar Years and Commonwealth Status
In 1946, the U.S. government granted Puerto Rico increased local autonomy, exemplified by the appointment of the first native Puerto Rican governor, Jesus T. Piñero. The right of popular election of the governor followed, and Muñoz Marín won the 1948 election. His administration undertook a program of agricultural reform and industrial expansion called "Operation Bootstrap." On July 25, 1952, the Commonwealth of Puerto Rico was proclaimed. The continuing Nationalist campaign for independence, however, was dramatized by an attempt to assassinate President Harry S. Truman in 1950 and by a shooting attack in the U.S. House of Representatives in 1954. Muñoz Marín was reelected in 1952, 1956, and 1960. He was succeeded by another Popular Democratic candidate, Roberto Sánchez Vilella.
In the face of an increasingly active movement for statehood, Sánchez arranged a plebiscite in 1967 in which Puerto Ricans could choose among independence, statehood, and maintenance of the commonwealth relationship. An overwhelming majority voted for no change, but Puerto Rico's status continued to be a lively issue, with most citizens favoring either statehood (an option the U.S. Congress showed little interest in pursuing) or commonwealth; only a small percentage desired independence. In the 1970s and 80s voters chose Popular Democratic party candidates in some gubernatorial elections while favoring prostatehood New Progressive party candidates in others.
In 1992, New Progressive party candidate Pedro Rosselló was elected governor (he was reelected in 1996). In 1993 and 1998, however, voters in nonbinding referenda rejected any change from commonwealth status by narrow margins, although more U.S. politicians voiced support for the statehood option. In the same period disputes over military use of Vieques caused friction. Challenges to the tax exemptions supporting Puerto Rico's industries brought cuts in 1993 and finally their abolition in 1996; uncertainty over the effect on the local economy was heightened by the loss of low-wage jobs in apparel manufacture to Mexico under the North American Free Trade Agreement (NAFTA). Sila María Calderón, of the Popular Democratic party, was elected governor in 2000, becoming the first woman to hold the post.
Aníbal Acevedo Vilá, also of the Popular Democratic party, was narrowly elected in 2004 to succeed Calderón. In Sept., 2005, Filiberto Ojeda Ríos, a fugitive independence activist and convicted felon, was killed in a shootout with the FBI. The FBI's handling of that and subsequent incidents involving independence supporters, as well as its lack of cooperation with a Puerto Rican investigation into Ojeda Ríos's death, sparked demonstrations that continued into 2006 and protests from Puerto Rican government officials. A government financial crisis in May, 2006, led to a partial government shutdown for two weeks until the governor and legislature agreed on an emergency loan plan as a solution to the crisis. In 2008 Acevedo was charged with corruption and violating campaign financing laws, which he denied. He subsequently lost (Nov., 2008) his reelection bid to Luis Fortuño, the Progressive party candidate; Acevedo was acquitted in Mar., 2009.
See F. Cordasco and E. Bucchioni, comp., The Puerto Rican Experience (1973); L. S. Rowe, United States and Puerto Rico (1975); R. A. Van Middledyk, The History of Puerto Rico (1975); R. Gordon, Social History of Puerto Rico (1976); R. Carr, Puerto Rico: A Colonial Experiment (1984); A. M. Carrion, Puerto Rico (1984); J. Morales, Jr., Puerto Rican Poverty and Migration (1986); R. Fernandez, The Disenchanted Island (2d ed., 1996); F. L. Rivera-Batiz and C. E. Santiago, Island Paradox: Puerto Rico in the 1990s (1997).
Puerto Rico officially the Commonwealth of Puerto Rico ("Estado Libre Asociado de Puerto Rico" [literally, "Associated Free State of Puerto Rico"]), is a self-governing unincorporated territory of the United States located in the northeastern Caribbean, east of the Dominican Republic and west of the Virgin Islands. The territory is composed of an archipelago that includes the main island of Puerto Rico and a number of smaller islands and keys, the largest of which are Vieques, Culebra, and Mona. The main island of Puerto Rico is the smallest by land area but third largest by population among the four Greater Antilles (Cuba, Hispaniola, Jamaica, and Puerto Rico).
Puerto Ricans often call the island Borinquen, from Borikén, its indigenous Taíno name. The terms boricua and borincano derive from Borikén and Borinquen respectively, and are commonly used to identify someone of Puerto Rican heritage. The island is also popularly known as "La Isla del Encanto", which translated means "The Island of Enchantment."
The first settlers were the Ortoiroid people, an Archaic Period culture of Amerindian hunters and fishermen. An archaeological dig in the island of Vieques in 1990 found the remains of what is believed to be an Arcaico (Archaic) man (named Puerto Ferro man) dated to around 2000 BC. Between AD 120 and 400 arrived the Igneri, a tribe from the South American Orinoco region. Between the 4th and 10th centuries, the Arcaicos and Igneri co-existed (and perhaps clashed) on the island. Between the 7th and 11th centuries the Taíno culture developed on the island, and by approximately 1000 AD had become dominant. This lasted until Christopher Columbus arrived in 1492.
The Spanish soon colonized the island. Taínos were forced into slavery and were decimated by the harsh conditions of work and by diseases brought by the Spaniards. In 1511, the Taínos revolted against the Spanish; cacique Urayoán, as planned by Agüeybaná II, ordered his warriors to drown the Spanish soldier Diego Salcedo to determine whether the Spaniards were immortal. After drowning Salcedo, they kept watch over his body for three days to confirm his death. The revolt was easily crushed by Ponce de León and within a few decades much of the native population had been decimated by disease, violence, and a high occurrence of suicide. African slaves were introduced to replace the Taíno. Puerto Rico soon became an important stronghold and port for the Spanish Empire. Various forts and walls, such as La Fortaleza, El Castillo San Felipe del Morro and El Castillo de San Cristóbal, were built to protect the port of San Juan from European enemies. France, The Netherlands and England made several attempts to capture Puerto Rico but failed to wrest long-term occupancy. During the late 17th and early 18th centuries colonial emphasis was on the more prosperous mainland territories, leaving the island impoverished of settlers.
In 1809, in the midst of the Peninsular War, the Supreme Central Junta based in Cádiz recognized Puerto Rico as an overseas province of Spain with the right to send representatives to the recently convened Spanish parliament. The representative, Ramon Power y Giralt, died after serving a three-year term in the Cortes. These parliamentary and constitutional reforms, which were in force from 1810 to 1814 and again from 1820 to 1823, were reversed twice afterwards when the traditional monarchy was restored by Ferdinand VII. Nineteenth century reforms augmented the population and economy, and expanded the local character of the island. After the rapid gaining of independence by the South and Central American states in the first part of the century, Puerto Rico and Cuba became the only Spanish colonies found in the Americas.
Toward the end of the 19th century, poverty and political estrangement with Spain led to a small but significant uprising in 1868 known as "Grito de Lares". It began in the rural town of Lares but was subdued when rebels moved to the neighboring town of San Sebastián. Leaders of this independence movement included Ramón Emeterio Betances, considered the "father" of the Puerto Rican independence movement, and other political figures such as Segundo Ruiz Belvis. In 1897, Luis Muñoz Rivera and others persuaded the liberal Spanish government to agree to Charters of Autonomy for Cuba and Puerto Rico. In 1898, Puerto Rico's first, but short-lived, autonomous government was organized as an 'overseas province' of Spain. The charter maintained a governor appointed by Spain, which held the power to annul any legislative decision, and a partially elected parliamentary structure. In February, Governor-General Manuel Macías inaugurated the new government under the Autonomous Charter. General elections were held in March and the autonomous government began to function on July 17, 1898.
The United States and Puerto Rico thus began a long-standing relationship. Puerto Rico began the 20th century under the military rule of the U.S. with officials, including the governor, appointed by the President of the United States. The Foraker Act of 1900 gave Puerto Rico a certain amount of popular government, including a popularly-elected House of Representatives. In 1917, the Jones-Shafroth Act granted Puerto Ricans U.S. citizenship and provided for a popularly-elected Senate to complete a bicameral Legislative Assembly. As a result of their new U.S. citizenship, many Puerto Ricans were drafted into World War I and all subsequent wars with U.S. participation.
Natural disasters, including a major earthquake, a tsunami and several hurricanes, and the Great Depression impoverished the island during the first few decades under American rule. Some political leaders, like Pedro Albizu Campos who led the Puerto Rican Nationalist Party, demanded change. On October 30, 1950, Albizu-Campos and other nationalists led a 3-day revolt (known as The Jayuya Uprising) against the United States in the town of Jayuya. The United States declared martial law and attacked Jayuya with infantry, artillery and bombers. On November 1, 1950, Puerto Rican nationalists Griselio Torresola and Oscar Collazo attempted to assassinate President Harry S Truman. Torresola was killed during the attack, but Collazo was captured. Collazo served 29 years in a federal prison, being released in 1979. Don Pedro Albizu Campos also served many years in a federal prison in Atlanta, Georgia, for seditious conspiracy to overthrow the U.S. government in Puerto Rico.
The internal governance changed during the latter years of the Roosevelt–Truman administrations, as a form of compromise led by Muñoz Marín and others. It culminated with the appointment by President Truman in 1946 of the first Puerto Rican-born governor, Jesus T. Piñero.
During the 1950s Puerto Rico experienced rapid industrialization, due in large part to Operación Manos a la Obra ("Operation Bootstrap"), an offshoot of FDR's New Deal, which aimed to transform Puerto Rico's economy from agriculture-based to manufacturing-based. Presently, Puerto Rico has become a major tourist destination and a leading pharmaceutical and manufacturing center. Yet it still struggles to define its political status. Three plebiscites have been held in recent decades to resolve the political status but no changes have been attained. Support for the pro-statehood party, Partido Nuevo Progresista (PNP) and the pro-commonwealth party, Partido Popular Democrático (PPD) remains about equal. The only registered pro-independence party, the Partido Independentista Puertorriqueño (PIP), usually receives 3-5% of the electoral votes.
On October 25, 2006, the State Department of Puerto Rico conferred Puerto Rican citizenship to Juan Mari Brás. The Supreme Court of Puerto Rico and the Puerto Rican Secretary of Justice determined that Puerto Rican citizenship exists and was recognized in the Constitution of Puerto Rico. Since the summer of 2007, the Puerto Rico State Department has developed the protocol to grant Puerto Rican citizenship to Puerto Ricans.
Puerto Rico has a republican form of government, subject to U.S. jurisdiction and sovereignty. Its current powers are all delegated by the United States Congress and lack full protection under the United States Constitution. Puerto Rico's head of state is the President of the United States. The government of Puerto Rico, based on the formal republican system, is composed of three branches: Executive, Legislative, and Judicial. The Executive branch is headed by the Governor, currently Mr. Anibal Acevedo Vila. The Legislative branch consists of a bicameral Legislative Assembly made up of a Senate upper chamber and a House of Representatives lower chamber. The Senate is headed by the President of the Senate, while the House of Representatives is headed by the Speaker of the House. The Judicial branch is headed by the Chief Justice of the Puerto Rico Supreme Court. The legal system is a mix of the civil law and the common law systems. The governor and legislators are elected by popular vote every four years. Members of the Judicial branch are appointed by the governor with the "advice and consent" of the Senate.
Puerto Rico has limited representation in the U.S. Congress in the form of a nonvoting delegate, formally called a Resident Commissioner (currently Luis Fortuño). The current Congress has returned the Commissioner's power to vote in the Committee of the Whole, but not on matters where the vote would represent a decisive participation. Puerto Rican elections are governed by the Federal Election Commission; While residing in Puerto Rico, Puerto Ricans cannot vote in U.S. presidential elections, but they can vote in primaries. Puerto Ricans who become residents of a U.S. state can vote in presidential elections.
As Puerto Rico is not an independent country, it hosts no embassies. It is host, however, to consulates from 42 countries, mainly from the Americas and Europe. Most consulates are located in San Juan. The Holy See has designated the Papal Nuncio in the Dominican Republic as the ecclesiastical liaison to the Roman Catholic Church in Puerto Rico; the Papal Nuncio in Washington, D.C. serves as the Vatican State's ambassador to the U.S. and the ecclesiastical liaison to the American Roman Catholic Church.
As an unincorporated territory of the United States, Puerto Rico does not have any first-order administrative divisions as defined by the U.S. government, but has 78 municipalities at the second level. Mona Island is not a municipality, but part of the municipality of Mayagüez. Municipalities are subdivided into wards or barrios, and those into sectors. Each municipality has a mayor and a municipal legislature elected for a four year term. The municipality of San Juan (previously called "town"), was founded first, in 1521, San Germán in 1570, Coamo in 1579, Arecibo in 1614, Aguada in 1692 and Ponce in 1692. An increase of settlement saw the founding of 30 municipalities in the 18th century and 34 in the 19th. Six were founded in the 20th century; the last was Florida in 1971.
From 1952 to present, Puerto Rico has had 3 political parties which stand for three distinct future political scenarios. The Popular Democratic Party (PPD) seeks to maintain the island's "association" status as a commonwealth, improved commonwealth and/or seek a true free sovereign-association status or Free Associated Republic, and has won a plurality vote in referendums on the island's status held over six decades after the island was invaded by the U.S. The New Progressive Party (PNP) seeks statehood. The Puerto Rican Independence Party seek independence. In 2007, a fourth party, Puerto Ricans for Puerto Rico Party (PPR), was ratified. The PPR's claims that it seeks to address the islands' problems from a status-neutral platform. Non-registered parties include the Puerto Rican Nationalist Party, the Socialist Workers Movement, the Hostosian National Independence Movement, and others.
Puerto Rico is an “unincorporated territory” of the United States which according to the US Supreme Court is “a territory appurtenant and belonging to the United States, but not a part of the United States.” Puerto Rico is subject to the Congress’ plenary powers under the “territorial clause” of Article IV, sec. 3, of the U.S. Constitution. US federal law applies to Puerto Rico, even though Puerto Rico is not a state of the American Union and has no voting representative in the US Congress. Due to the establishment of the Federal Relations Act of 1950, all federal laws that are “not locally inapplicable” are automatically the law of the land in Puerto Rico.
In 1967, the Legislative Assembly tested the political interests of the Puerto Rican people by passing a plebiscite Act that provided for a vote on the status of Puerto Rico. This constituted the first plebiscite by the Legislature for a choice on three status options (continued Commonwealth, statehood, and independence). The Commonwealth option, represented by the PDP, won with a majority of 60.4% of the votes. After the plebiscite, efforts in the 1970s to enact legislation to address the status issue died in Congressional committees. In subsequent plebiscites on 1993 and 1998, the status quo was upheld.
Puerto Rico is classified by the U.S. government as an independent taxation authority by mutual agreement with the U.S. Congress. Contrary to common misconception, residents of Puerto Rico pay some U.S. federal taxes: import/export taxes, federal commodity taxes, social security taxes, etc. Most residents do not pay federal income tax but pay federal payroll taxes (Social Security and Medicare), and Puerto Rico income taxes. But federal employees, or those who do business with the federal government, Puerto Rico-based corporations that intend to send funds to the U.S. and others also pay federal income taxes. Because the cutoff point for income taxation is lower than that of the U.S. IRS code, and because the per-capita income in Puerto Rico is much lower than the average per-capita income on the mainland, more Puerto Rico residents pay income taxes to the local taxation authority than if the IRS code were applied to the island. Residents are eligible for Social Security benefits upon retirement. But Puerto Rico is excluded from Supplemental Security Income (SSI) and receives less than 15% of the Medicaid funding it would be allotted as a state, while Medicare providers receive only partial state-like reimbursements for services rendered to beneficiaries in Puerto Rico (even though the latter paid fully into the system).
Puerto Ricans may enlist in the U.S. military. Since becoming statutory United States citizens in 1917, Puerto Ricans have been included in the compulsory draft whenever it has been in effect. Puerto Ricans have participated in all U.S. wars since 1898, most notably World War II, the Korean and Vietnam wars, as well as the current Middle Eastern conflicts.
Puerto Rico consists of the main island of Puerto Rico and various smaller islands, including Vieques, Culebra, Mona, Desecheo, and Caja de Muertos. Of these last five, only Culebra and Vieques are inhabited year-round. Mona is uninhabited most of the year except for employees of the Puerto Rico Department of Natural Resources. There are also many other even smaller islands including Monito and "La Isleta de San Juan" which includes Old San Juan and Puerta de Tierra.
Puerto Rico has an area of , of which is land and is water. The maximum length from east to west is , and the maximum width from north to south is . Comparing land areas, Puerto Rico is 8/10 the size of Jamaica and 8/100 the size of Cuba, the next smallest and the largest countries in the Greater Antilles, respectively. Compared to U.S. states, it is larger than Delaware and Rhode Island combined, but slightly smaller than Connecticut. The main island is mostly mountainous with large coastal areas in the north and south. The main mountain range is called "La Cordillera Central" (The Central Range). The highest elevation in Puerto Rico, Cerro de Punta (4,390 feet; 1,338 m), is located in this range. Another important peak is El Yunque, one of the highest in the Sierra de Luquillo at the El Yunque National Forest, with an elevation of 3,494 feet (1,065 m).
Puerto Rico has 17 lakes, all man-made, and more than 50 rivers, most originating in the Cordillera Central. Rivers in the northern region of the island are typically longer and of higher water flow rates than those of the south, since the south receives less rain than the central and northern regions.
Puerto Rico is composed of Cretaceous to Eocene volcanic and plutonic rocks, overlain by younger Oligocene and more recent carbonates and other sedimentary rocks. Most of the caverns and karst topography on the island occurs in the northern region in the carbonates. The oldest rocks are approximately 190 million years old (Jurassic) and are located at Sierra Bermeja in the southwest part of the island. They may represent part of the oceanic crust and are believed to come from the Pacific Ocean realm.
Puerto Rico lies at the boundary between the Caribbean and North American plates and is being deformed by the tectonic stresses caused by their interaction. These stresses may cause earthquakes and tsunamis. These seismic events, along with landslides, represent some of the most dangerous geologic hazards in the island and in the northeastern Caribbean. The most recent major earthquake occurred on October 11, 1918 and had an estimated magnitude of 7.5 on the Richter scale. It originated off the coast of Aguadilla and was accompanied by a tsunami.
The Puerto Rico Trench, the largest and deepest trench in the Atlantic, is located about north of Puerto Rico in the at the boundary between the Caribbean and North American plates. It is long and about wide. At its deepest point, named the Milwaukee Deep, it is deep, or about .
Located in the tropics, Puerto Rico enjoys an average temperature of throughout the year. Temperatures do not change drastically throughout the seasons. The temperature in the south is usually a few degrees higher than the north and temperatures in the central interior mountains are always cooler than the rest of the island. The Hurricane season spans from June to November. The all-time low in Puerto Rico has been , registered in Aibonito.
Species endemic to the archipelago are 239 plants, 16 birds and 39 amphibians/reptiles, recognized as of 1998. Most of these (234, 12 and 33 respectively) are found on the main island. The most recognizable endemic species and a symbol of Puerto Rican pride is the Coquí, a small frog easily identified by the sound of its call, and from which it gets its name. Most Coquí species (13 of 17) live in the El Yunque National Forest, a tropical rainforest in the northeast of the island previously known as the Caribbean National Forest. El Yunque is home to more than 240 plants, 26 of which are endemic to the island. It is also home to 50 bird species, including the critically endangered Puerto Rican Amazon. Across the island in the southwest, the of dry land at the Guánica Dry Forest Reserve contain over 600 uncommon species of plants and animals, including 48 endangered species and 16 endemic to Puerto Rico.
In the early 1900s the greatest contributor to Puerto Rico's economy was agriculture and its main crop was sugar. In the late 1940s a series of projects codenamed Operation Bootstrap encouraged a significant shift to manufacture via tax exemptions. Manufacturing quickly replaced agriculture as the main industry of the island. Puerto Rico is classified as a high income country by the World Bank.
Economic conditions have improved dramatically since the Great Depression due to external investment in capital-intensive industries such as petrochemicals, pharmaceuticals and technology. Once the beneficiary of special tax treatment from the U.S. government, today local industries must compete with those in more economically depressed parts of the world where wages are not subject to U.S. minimum wage legislation. In recent years, some U.S. and foreign owned factories have moved to lower wage countries in Latin America and Asia. Puerto Rico is subject to U.S. trade laws and restrictions.
Also, starting around 1950, there was heavy migration from Puerto Rico to the Continental United States, particularly New York City, in search of better economic conditions. Puerto Rican migration to New York displayed an average yearly migration of 1,800 for the years 1930-1940, 31,000 for 1946-1950, 45,000 for 1951-1960, and a peak of 75,000 in 1953. As of 2003, the U.S. Census Bureau estimates that more people of Puerto Rican birth or ancestry live in the U.S. than in Puerto Rico.
On May 1, 2006, the Puerto Rican government faced significant shortages in cash flows, which forced the closure of the local Department of Education and 42 other government agencies. All 1,536 public schools closed, and 95,762 people were furloughed in the first-ever partial shutdown of the government in the island's history. On May 10, 2006, the budget crisis was resolved with a new tax reform agreement so that all government employees could return to work. On November 15, 2006 a 5.5% sales tax was implemented. Municipalities are required by law to apply a municipal sales tax of 1.5% bringing the total sales tax to 7%.
Tourism is an important component of Puerto Rican economy supplying an approximate $1.8 billion. In 1999, an estimated 5 million tourists visited the island, most from the U.S. Nearly a third of these are cruise ship passengers. A steady increase in hotel registrations since 1998 and the construction of new hotels and new tourism projects, such as the Puerto Rico Convention Center, indicate the current strength of the tourism industry.
Puerto Ricans had a per capita Gross Domestic Product (GDP) of $19,600 for 2007. By comparison, the poorest state of the Union, Mississippi, had a per capita GSP (nominal) of $24,062 in 2006. The United Nation's Human Development Index ranking is not regularly available for Puerto Rico, though the UN Development Program assigned it a .942 score in 1998, which would place it among the top 15 countries in the HDI rankings.
Emigration has been a major part of Puerto Rico's recent history. Starting soon after WWII, poverty, cheap airfare and promotion by the island government caused waves of Puerto Ricans to move to the continental United States, particularly to New York City, New York; Newark, Jersey City, Paterson, and Camden, New Jersey; Chicago, Illinois; Springfield and Boston, Massachusetts; Orlando, Miami and Tampa, Florida; Philadelphia, Pennsylvania; Hartford, Connecticut; Washington, D.C., and Los Angeles, California. This trend continued even as Puerto Rico's economy improved and its birth rate declined.