Euro currency in Cuba since 1998, and Syria since 2006. There are also various currencies pegged to the euro (see below). In 2009, Zimbabwe abandoned its local currency and used major currencies instead, including the euro and the United States dollar. Since its introduction, the euro has been the second most widely held international reserve currency after the U.S. dollar. The share of the euro as a reserve currency increased from 18% in 1999 to 27% in 2008. Over this period, the share held in U.S. dollar fell from 71% to 64% and that held in Yen fell from 6.4% to
World currency unit The WCU – World Currency Unit (WCU) is an indexed unit of account that stands for a unit of real global purchasing power. Since each unit by design represents a stable unit of purchasing power, the stipulated interest rate on WCU-denominated bonds represents a real interest rate. In principle, the common denomination of bonds by issuers from different parts of the world using the WCU, as well as the greater transparency of real interest rates, will produce more efficient capital markets, as savers and borrowers around the world converge in their understanding of what each basis point of interest means