Source: http://sploid.gizmodo.com/popularity-of-the-top-music-genres-since-1950-in-one-be-1641887690/+caseychan
I know that Google has a Music Timeline, but it's horrendous. This one made by Atracktion is much prettier. And it's interactive too, so go an enjoy it here. Rock, pop, hiphop, and electronic look equally distributed now.
Read more...