Prostitution in South Korea is illegal,[1] but according to The Korea Women's Development Institute, the sex trade in Korea was estimated to amount to 14 trillion South Korean won ($13 billion) in 2007, roughly 1.6% of the nation's gross domestic product.[2][3] According to a survey conducted by the Department of Urology at the Korea University College of Medicine in 2015, 23.1% of males and 2.6% of females, aged 18–69, had sexual experience with a prostitute.[4]