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. (jan 1, 1921 – dec 1, 1921)
Added to timeline:
Date:
jan 1, 1921
dec 1, 1921
~ 11 months