tokens: The overall prevalence of condom use was 51.2 % ( 95%CI 42.7 - 59.7 % ) , followed by oral contraceptives ( 20.5 % , 95%CI 13.7 - 27.3 % ) , withdrawal ( 12.7 % , 95%CI 9.4 - 15.9 % ) , and rhythm ( 12.1 % , 95%CI 6.7 - 17.4 % ) .