The number of persons living on larger farms jumped 67 percent between 1975 and 1980, while smaller and midsize farms together lost about 20 percent of their population. Despite the heaviest rates of population loss, smaller farms (annual sales less than $20,000) still contain about half of the U.S. farm population. Midsize farms (annual sales between $20,000 and $99,999) lost about 7 percent of their population during 1975-80 but still contain nearly 33 percent of the U.S. farm population. Although the number of persons living on larger farms (annual sales of $100,000 and over) increased substantially, they only account for 18 percent of farm residents.