Currency board the Deutsche Mark from 1992 to 1999 when it switched to fixing to the Euro at par. The peg to the Euro was upheld until January 2011 with Estonia's adoption of the Euro. This policy is seen as a mainstay of that country's subsequent economic success (see Economy of Estonia for a detailed description of the Estonian currency board). Argentina abandoned its currency board in January 2002 after a severe recession. To some, this emphasised the fact that currency boards are not irrevocable, and hence may be abandoned in the face of speculation by foreign exchange traders. However, Argentina's system
50 euro note became the currency of over 300 million people in Europe. For the first three years of its existence it was an invisible currency, only used in accounting. Euro cash was not introduced until 1 January 2002, when it replaced the national banknotes and coins of the 12 countries in the eurozone, such as the Dutch guilder and the Portuguese escudo. Today, the €50 note is used by some 332 million Europeans and in the 22 countries which have it as their sole currency (with 20 legally adopting it). Slovenia joined the Eurozone in 2007, Cyprus and Malta in 2008, Slovakia