Digital music sales tripled in 2005

" According to the International Federation of the Phonographic Industry (IFPI), legal sales of digital music increased by over 200 percent in 2005 over the year before. Sales were split between mobile phone ring tones, which consisted of 40 percent of the total, and online music downloading services such as Apple's iTunes Music Store (iTMS), which took the other 60 percent.

Digital music sales represent six percent of the total recording industry's revenues, which is up from about two percent in 2004 and only a fraction of a percent in 2003. This represents significant growth, although clearly sales of traditional media (such as CDs) continue to provide the lion's share of the recording's industry's revenue ..."

http://arstechnica.com/news.ars/post/20060119-6015.html