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. (0h 58min, jan 1, 1921 y – 15h 14min, dec 31, 1921 y)