By the 1930s, Percherons accounted for over 70 percent of the purebred draft horses in the United States, and all of the major land-grant universities maintained stables of Percherons. A 1930 census of horses found over 33,000 Percherons in the United States, with the next most popular breed, the Belgian, having a population of less than 10,000. One Percheron historian attributes this popularity to the breed's "strength, energy, activity, robustness and endurance".Mischka, The Percheron Horse in America, pp. 14–16 After , increasing mechanization prompted a decline in the Percheron population. In 1954, only 85 Percherons were registered in the US, a record low. The 1950s, 1960s and early 1970s were bad years for the US Percheron population, and breeding was reduced to only a few farms. These breeders kept the American population alive through these years, however, and the 1980s saw renewed interest in the breed.Mischka, The Percheron Horse in America, p. 21
