Reserve currency economy, the German Deutsche Mark gained the status of the second most important reserve currency after the US dollar. When the euro was introduced on 1 January 1999, replacing the Mark, French franc and ten other European currencies, it inherited the status of a major reserve currency from the Mark. Since then, its contribution to official reserves has risen continually as banks seek to diversify their reserves, and trade in the eurozone continues to expand. Former U.S. Federal Reserve Chairman Alan Greenspan said in September 2007 that the euro could replace the U.S. dollar as the world's primary reserve currency.
Korean currency also got devaluated. This was the reason for the reintroduction of won in 1962 as the official currency unit. South Korean currency was still pegged to the US dollar until in 1997 when it was floated into the world market. The Joseon Dynasty issued its first copper coins. In 1888, shortly before the yang was introduced, a small number of coins denominated in hwan (圜) and mun (文) were minted. Even though the yang had been used in past it was reintroduced as the main currency in 1892. One yang was subdivided in 100 fun, making it the first Korean