In December 2005, Congress decided to create a new series of $1 coins that would honor the former U.S. presidents. In 2007, Presidential coins of four different designs were produced. Another four designs will be produced each year, honoring the Presidents in order of service. (Grover Cleveland is on two coins, since he served two non-consecutive terms.) The Presidential $1 Coin Act is intended to create renewed interest in dollar coins, like that seen during the 50 State Quarters program. At least one third of all dollar coins produced are still Sacagawea coins, with the remaining coins making up the four presidential coins annually. Under federal law (), no coins may be issued featuring a living president, or a president who died less than two years earlier.