"Trends in U.S. Agriculture, published by USDA-NASS ",,,
"Labor Force & Farm Labor: 1900 - 1990",,,
"Sources: U.S. Census Bureau and U.S. Bureau of Labor Statstistics",,,
,,,
,"U.S. Labor","Employed","% US Labor"
"Year","Force","Farm Labor","On Farms"
1900,28500000,11050000,38.8%
1910,36850000,11260000,30.6%
1920,41720000,10440000,25.0%
1930,48783000,10340000,21.2%
1940,56180000,9540000,17.0%
1950,63858000,7160000,11.2%
1960,72142000,5458000,7.6%
1970,85903000,3462000,4.0%
1980,106940000,2741000,2.6%
1990,125840000,2094000,1.7%

"Trends in U.S. Agriculture, published by USDA-NASS ",,,
"U.S. Population and Farm Population: 1900 - 1990",,,
"Source: U.S. Census Bureau",,,
"Year","US Pop","Farm Pop"," % US Pop on Farms"
"-","-","-","-"
1900,76212168,29875000,39.2%
1910,92228496,32077000,34.8%
1920,106021537,31974000,30.2%
1930,123202624,30529000,24.8%
1940,132164569,30547000,23.1%
1950,151325798,23048000,15.2%
1960,179323175,13445000,7.5%
1970,203302031,9712000,4.8%
1980,226542199,6051000,2.7%
1990,248709873,4591000,1.8%