Euro in Madrid. The euro was introduced to world financial markets as an accounting currency on 1 January 1999, replacing the former European Currency Unit (ECU) at a ratio of 1:1 (US$1.1743). Physical euro coins and banknotes entered into circulation on 1 January 2002, making it the day-to-day operating currency of its original members, and by March 2002 it had completely replaced the former currencies. While the euro dropped subsequently to US$0.83 within two years (26 October 2000), it has traded above the U.S. dollar since the end of 2002, peaking at US$1.60 on 18 July 2008. In late 2009, the
Euro two percent higher on the year, approximately at the same level as it was before the crisis kicked off in 2007. The formal titles of the currency are "euro" for the major unit and "cent" for the minor (one hundredth) unit and for official use in most eurozone languages; according to the ECB, all languages should use the same spelling for the nominative singular. This may contradict normal rules for word formation in some languages, e.g., those where there is no "eu" diphthong. Bulgaria has negotiated an exception; "euro" in the Bulgarian Cyrillic alphabet is spelled as eвро ("evro") and