As of 2016, interesting world population statistics include the fact that the total number of people on Earth is over 7.3 billion, and this number increases by more than one person per second. The five most populous countries are China, India, the United States, Indonesia and Brazil. China and India each support populations of more than 1 billion.
Statistics about world demographics constantly change, and statisticians periodically revise projections and estimates. Since 1950, India's population has increased by nearly a billion people, and China's has more than doubled. The five largest cities in the world are Tokyo, Japan; Delhi, India: Shanghai, China; Sao Paulo, Brazil; and Mumbai, India. The five smallest countries in the world are San Marino, in southern Italy; Palau, an island in the Pacific; Nauru, an island northeast of Australia; Tuvalu, an island near Nauru; and Vatican City, the smallest nation on Earth.
Over 700 million people don't get enough food to eat, and over 1.5 billion are overweight. More than half a billion people have no access to safe drinking water. Several million people die each year from diseases such as cancer and malaria.
One statistic about the world's population that has circulated in popular culture for many years is actually inaccurate. The number of people alive today is greater than the number of people who ever lived, according to an often-repeated social rumor. According to a demographer at the Population Reference Bureau, over 106 billion people have been born in the past 50,000 years.