U.S. Proof Sets (1936-Date): All Proof sets issued from 1936 to 1972 include the cent, nickel, dime, quarter and half dollar; from 1973 until 1981 the dollar was added and then removed from the sets in 1982. The Sacagawea Golden Dollar is included in 2000 thru 2003 (10-coin) Proof sets. In 2004 and 2005 the Mint has also added two commemorative nickels, making them the largest Proof coin sets ever produced!