I would say 1% or lower. Beauty truly is in the eye of the beholder, so i guess the percentage may be higher depending on the person. Am i good looking? you're goddamn right. I'm a fucking stallion.
Perhaps if you watch fight club a few dozen more times and have intense masturbation sessions to your role model, add a few thousand dollars for plastic surgery and penis enlargement, you might pass as 'average' but don't get your hopes up ikea boy.