Farming’s changing role in the Nation’s economy 
1900   41 percent of workforce employed in agriculture
1930   21.5 percent of workforce employed in agriculture; 
Agricultural GDP as a share of total GDP, 7.7 percent
1945   16 percent of the total labor force employed in agriculture;
Agricultural GDP as a share of total GDP, 6.8 percent 
1970   4 percent of employed labor force worked in agriculture; 
Agricultural GDP as a share of total GDP, 2.3 percent
2000/02   1.9 percent of employed labor force worked in agriculture (2000); Agricultural GDP as a share of total GDP (2002), 0.7 percent
Source: Compiled by Economic Research Service, USDA. Share of workforce employed in agricul ture, for 1900-1970, Historical Statistics of the United States; for 2000, calculated using data from Census of Population; agricultural GDP as part of total GDP, calculated using data from the Bureau of Economic Analysis.