Rock records aren’t exactly setting the charts on fire so far this century. Only one of the Top 20 albums on Billboard’s new list of the Top 200 Albums of the 21st Century is by a rock artist: Nickelback‘s 2005 release All the Right Reasons,

The year 1975 was a very good one for Elton John and Chicago. It was pretty good as well for artists from Olivia Newton-John to Led Zeppelin, too.

In the 21st century, music became more universal, immediate, and accessible than ever before. On Jan. 1, 2000, the average cost of a CD was about $18, which meant if you wanted to legally own 250 albums,