CFA franc
In 1973, Mauritania replaced the CFA franc with the ouguiya at a rate of 1 ouguiya = 5 francs. Mali readopted the CFA franc in 1984, at a rate of 1 CFA franc = 2 Malian francs. The former Portuguese colony of Guinea-Bissau adopted the CFA franc in 1997, replacing the Guinea-Bissau peso at a rate of 1 CFA franc = 65 pesos.