No one seems to have tracked it back to the original source nor noticed what happened to catch my eye straight away: This chart sucks.
This is a great piece on the decline of music sales. What's interesting to me, as hard as it is for the "industry" to adjust to change, independent artists seem to be finding their way in this new world. Overhead is lower when you're on your own, and you keep more ducats on what you sell, and you need fewer fans to justify your existence.
Seems like getting out from under big labels and embracing the power of the single might just be smart business.