Coins of the United States dollar were first minted in 1792. New coins have been produced annually since then and they make up a valuable aspect of the
United States currency system. Today, circulating coins exist in denominations of 1¢ (i.e. 1
cent or $0.01), 5¢, 10¢, 25¢, 50¢, and $1.00. Also minted are
bullion (including
gold,
silver and
platinum) and
commemorative coins. All of these are produced by the
United States Mint. The coins are then sold to
Federal Reserve Banks which in turn are responsible for putting coins into circulation and withdrawing them as demanded by the country's
economy.