of Treasury approved the design on July 31, 2008. The coins were issued, as well as "proof coins" and 90% silver special issues. The Puerto Rico coin was the second release in 2009. In 2012, as part of the National Park Quarters Program initiative, the United States Mint was due to release a quarter commemorating the inclusion of El Yunque National Forest as part of the National Forest System in 1903. See also Cuban peso Spanish dollar Spanish peseta Central banks and currencies of the Caribbean Currencies of the British West Indies References Sources External links Puerto Rico Monetary History Sociedad Numismática de Puerto Rico Historia de la Moneda y Numismática en Puerto Rico Puerto Rico Puerto Rico Economic history of Puerto Rico Puerto Rico Puerto Rico