By the beginning of 1921, money has lost 96% of its pre-war value; industrial production has fallen to 10% of its 1913 level. The population of Petrograd has fallen from 2.5 million in 1917 to 600,000 in 1920 (6h 27min, jan 26, 1921 y – 8h 1min, dec 1, 1921 y)