War Communism saved the Soviet government during the Civil War, but much of the Russian economy had ground to a standstill. The peasants responded to requisitions by refusing to till the land. By 1921 cultivated land had shrunk to 62% of the pre-war area, and the harvest yield was only about 37% of normal. The number of horses declined from 35 million in 1916 to 24 million in 1920 and cattle from 58 to 37 million. The exchange rate with the US dollar declined from two rubles in 1914 to 1,200 in 1920.