As has already been pointed out, your statistics come from a questionable source, one that has a financial stake in exaggerating the porn "problem". But even if the statistics are 100% reliable (which, for all I know, they are), shall I quote some statistics on the health issues associated with smoking? With fast food? With risky activities such as skydiving, bungee jumping, or crossing the street? Would such statistics justify forbidding consenting adults from engaging in these activities?
No. Just thought they were interesting.