Some 33 mln Americans age 12+ listen to a radio station over the internet during an average week – up from 29 mln listeners in 2006, according to Arbitron and Edison Media Research. 13% of Americans age 12 or older (an estimated 33 mln people) had listened to online radio in the previous week – an increase of two percentage points from January 2007. 24% of all Americans age 12 or older have a profile on a social-networking site such as MySpace, Facebook or LinkedIn, 63% of online radio listeners have a profile on such sites. 33% of online radio listeners with a social network profile visit their social networking site nearly every day or several times per day.