381 million metric tons of total feed (in dry matter or grain equivalent tons) were used in agriculture in 1961, increasing to 1.585 billion metric tons in 2020 (USDA, 2024).
USDA, 2024
USDA.2024. World Agricultural Production, Resource Use, and Productivity, 1961–2020. https://opsaa.iica.int/resource-1366-produccion-agricola-mundial,-uso-y-productividad,-1961-2020