The United States stopped making circulating coins out of 90% silver in 1964. The Coinage Act of 1965, signed by President Lyndon Johnson, eliminated silver from the circulating United States dime (ten-cent piece) and quarter dollar coins. However, half-dollar coins were still made with 40% silver from 1965 to 1970. After 1970, no more circulating U.S. coins were made with silver.
The United States Mint still regularly strikes bullion and collectible coins in 99.9% fine silver, however, these coins are not released into circulation.
