In 1971, the Federal marketing order system regulated 81 percent of the Nation's fluid milk sales, compared with over 50 percent in 1955. During 1971, 141,318 producers delivered 67.9 billion pounds of milk to Federal order handlers—more than 60 percent of all milk sold to plants and dealers. The farm value of this milk was $4.2 billion. Thirty-seven States administer milk distribution in one or more of the following ways: Establish minimum prices at the farm, wholesale, or retail levels; regulate trade practices; or permit milk promotional programs financed through producer or handler assessment or appropriation.