This Nielsen Company report for 2009 presents overall music sales statistics and factoids for the period from January 5, 2009 to Januray 3, 2010. This report focuses mainly on top-ten artists for various categories ranging from vinyl to internet, and digital music sales.
This infographic shows a pie chart that details the sales for different music formats from 1980 to 2010 and clearly indicates the recent impact of digital downloads.