Question: when did us dollar not backed by gold
Answer: 1971; 1971; 1971-08-15; 15 08 1971; 1971 August, 15; 08 15 1971; 1971-08-15; 15-08-1971; 1971 08 15; 15 August 1971; 08/15/1971; 15/08/1971; 08-15-1971; 1971 August 15