The following is a detailed count of music transactions and plays in the United States, specifically between the dates of January 3rd and May 1st of this year. That includes albums (physical and digital), paid downloads (sorry, no P2P), on-demand and non-interactive stream, and traditional radio spins.
The tally was presented by Nielsen at the NARM conference in Los Angeles on Wednesday, and includes data from Yahoo, AOL, Napster, Rhapsody, Slacker, MediaNet, Guvera, Thumbplay, Vevo, Akoo, and others, with CD and download data from Soundscan.
In terms of year-over-year comparisons (for the same time period), song downloads are actually up 8 percent. In 2010 overall, that increase was just 1 percent. And, here's more year-over-year data on the album side.