JOHANNESBURG — A new survey said more than one in three South African men admit to having committed rape.A study led by the government-funded Medical Research Foundation said that in Gauteng province, home to South Africa's most populous city of Johannesburg, more than 37 percent of men said they had raped a woman. Nearly 7 percent of the 487 men surveyed said they had participated in a gang rape.More than 51 percent of the 511 women interviewed said they'd experienced violence from men, and 78 percent of men said they'd committed violence against women.A quarter of the women interviewed said they'd been raped, but the study says only one in 25 rapes are reported to police.