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 (6 h 27 m, 26 jan 1921 ano – 8 h 1 m, 1 dez 1921 ano)
