According to the article here, that's the number the author believes is an accurate estimate. I call BS. Hell, the majority of women I know LOVE to be photographed, to the point of inconvenience for the rest of the group. Just take a gander at ANY social media outlet, and you'll see just how insane their narcissism can get.

I would say the majority of women (>50%), and the vast majority of attractive women (>75%) display traits of narcissism. Sad to say, the ones I want to fuck the most almost always show a lot of these traits...but oh well.