A few numbers show the magnitude of this historic change. As recently as 1950, there were 10 million people working on farms in the United States, repre- senting 17 percent of the labor force. In 1998, fewer than 3 million people worked on farms, or 2 percent of the labor force. This change coincided with tremendous advances in farm productivity: Despite the 70 percent drop in the number of farm- ers, U.S. farms produced more than twice the output of crops and livestock in 1998 as they did in 1950.