CFAフラン
The franc zone, a currency union in sub-Saharan Africa, was established when the CFA franc (or ) was created in 1945 as a colonial currency for over a dozen of France's African colonies. The zone continues to exist even after the colonies had achieved their independence in the early 1960s, with only three African countries ever leaving the zone, mostly for reasons of national prestige. One of the three countries, Mali, rejoined the zone in 1984. The CFA franc was pegged to the French franc (now the euro) and its convertibility was guaranteed by the French Treasury. Despite sharing the same exchange rate, the CFA franc is actually two currencies, the Central African CFA franc and the West African CFA franc, which are run by their respective central banks in Central and West Africa. The foreign exchange reserves of member countries are pooled and each of the two African central banks keeps 65% of its foreign reserves with the French Treasury.