By 1971, the money supply had increased by 10%. In May 1971, West Germany left the Bretton Woods system, unwilling to revalue the Deutsche Mark. In the following three months, this move strengthened its economy. Simultaneously, the dollar dropped 7.5% against the Deutsche Mark. Other nations began to demand redemption of their dollars for gold. Switzerland redeemed $50 million in July. France acquired $191 million in gold. On August 5, 1971, the United States Congress released a report recommending devaluation of the dollar, in an effort to protect the dollar against "foreign price-gougers". On August 9, 1971, as the dollar dropped in value against European currencies, Switzerland left the Bretton Woods system. The pressure began to intensify on the United States to leave Bretton Woods.