 The prevalence of condom use varies greatly between countries . Most surveys of contraceptive use are among married women , or women in informal unions . Japan has the highest rate of condom usage in the world : in that country , condoms account for almost 80 % of contraceptive use by married women . On average , in developed countries , condoms are the most popular method of birth control : 28 % of married contraceptive users rely on condoms . In the average less @-@ developed country , condoms are less common : only 6 – 8 % of married contraceptive users choose condoms . 
