Says who, do you think everyone will admit they had sex before being married. Unless you were hancuffed to them you realy don't know.
Why wouldn't they admit to it? I can tell where you stand based on your incredibly stupid "the other 5% lied" comment, but give me a break. The overwhelming peer pressure that exists is for people to HAVE sex. People are more likely (especially young men) to lie and say they did lose their virginity than they are to lie and say that they never did that.