On second thought, since we’re discussing teens, these numbers are probably better. This chart shows typical and perfect use failure rates for people using that method for their first year. As expected, the typical use failure rates are higher, possibly because people new to a method make more mistakes (or people new to sex aren’t as conscientious about using contraception every time and are present in these stats at a higher rate than the gen pop.) Among this population, condom rate is at 15 and withdrawal at 27. Nothing at all is still at 85, but I question how that number was arrived at; it’s the same theoretical number as general charts, and I would not be surprised if it should be higher for teens. Fertile little buggers.