If 99.9% of humanity agrees that sex work is bad, then surely sex workers and their customers combined must make up at most 0.1% of the population, right? And yet there are an estimated 1 to 2 million prostitutes in the US, so about 0.2% of the population, and presumably the clients outnumber the sex workers... so your magic number seems very very unlikely. I doubt even 99.9% of your friends and family would share your opinion, though they may not feel comfortable admitting this to you (you seem rather judgemental and close-minded).