The U.S. Silver Proof Set series began in 1992 and has grown to become one of the most popular issues each year. All 17 years are available, even the ultra rare 1999 set, the first to include State Quarters. The sets include Lincoln Cents, Jefferson Nickels, Silver Roosevelt Dimes, Silver Washington Quarters, Silver Washington Statehood Quarters, Silver Kennedy Half Dollars and golden Sacajawea Dollars. The 2007 and 2008 sets include the four Presidential Dollars issued those years.