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. (17h 31min, jan 10, 1921 y – 8h 55min, dec 16, 1921 y)
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