Melissa Farley's study of 854 prostitutes in nine countries - Canada, Colombia, Germany, Mexico, South Africa, Thailand, Turkey, the United States, and Zambia - found that 95% of prostitutes had been physically assaulted, and 75% had been raped. 89% of the women interviewed stated that they wanted to leave prostitution. However the methodology and neutrality of Farley's studies has been criticised by other academics such as Ronald Weitzer. Weitzer has also said that Farley's findings are heavily influenced by radical feminist ideology.