On basis of spending a lot of my teenage time browsing 4chan, I'd say it's not 15%, but closer to 69% or even whole 420%. You just loose faith in humanity from spending too much time on the internet.

An online survey administered via Survey Monkey, of course.

Don't you know this is HN? A hand wave here is worth more than any methodical research.

Based on what I learned from this video: https://youtu.be/r7l0Rq9E8MY?t=2