Nice, that's an awesome chart! Haven't come across it before. Kinda surprised that <header> and <footer> don't show up anywhere
Perhaps a v2 is in order ;)
Edit: I just noticed the date on it is 2011-07-22, so yeah, a v2 really would be good.
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.