That exchange rate was maintained until 1971, when the United States abandoned the gold standard, which had been a key element of the Bretton Woods System, and imposed a 10 percent surcharge on imports, setting in motion changes that eventually led to floating exchange rates in 1973.
Esa taxa de cambio mantívose ata 1971, cando os Estados Unidos abandonaron o estándar de cambio do ouro, parte clave do sistema de Bretton Woods, e impuxo un imposto ás importacións dun 10 por cento, provocando que xurdisen as taxas de cambio flotantes en 1973.