The U.S. Conference of Catholic Bishops had authorized the study.92 It concluded that 95 percent of American dioceses had at least one complaint of a sexual assault by a priest against a minor (the authors did not count incidents before 1950).93 During the five-plus decades, 4,392 priests had been accused of abusing 10,667 children, a figure that in some years was as high as 10 percent of all priests.94 At least 143 were serial molesters who carried out their attacks in multiple dioceses.95 Four out of five victims were minor boys.96