The website Macrotrends provides a historical chart of silver prices for the past 100 years. The site lets users filter the data to see prices from the past 30 years only.
Macrotrends provides its comprehensive historical data on a detailed interactive chart, which allows users to track the information quickly on a large scale or to view data on a month-to-month basis. The prices are inflation-adjusted and show recessions by default, but users have the option to turn these features off. The site also features charts showing the ratio of the prices of silver to gold historically, based on the same 100-year historical data, as well as the full history of the month-end ratio of the Philadelphia Gold and Silver Index to the price of gold bullion, which dates back to 1983.
Those who need historical data going further back can turn to Kitco Metals' historical chart of metal prices from 1792 to 1999. The chart, which is not interactive, shows how prices have changed on a larger scale.
The Silver Institute provides a chart of historical silver prices from 1981 to 1990. This chart also includes a historical analysis of the factors that affected silver prices at the time, including specific monthly prices.