@Riot Who Gets Banned the Most?

I was wondering if there was a statistic of which lane/champion gets banned the most, or which role gets banned more than others. Roles, as in, assassin, adc marksman, support, tank, fighter, I want to know which gets banned the most for verbal abuse, leaving, trolling etc.

If someone could respond in the comments if they know anything it would be great, guesses are also welcome.