Number of US Users of File-Sharing Networks in 2010

9 percent of Internet users, or 16 million people, used file-sharing networks to download music off the Internet during the 4th quarter of 2010. The number of people is down from the 16 percent, or 28 million people, who used file-sharing networks in the 4th quarter of 2007.

Source: Mashable, “U.S. Internet piracy is on the decline,” USA Today, March 25, 2011.