Music sold through the iTunes Store makes up a full quarter of all music sold in the US, according to a new report from the NPD Group. The market research firm noted that paid digital music downloads have continued to grow since 2007 (from 20 percent to 35 percent this year) with the help of iTunes, Amazon, and Walmart's online offerings, and that digital music sales may even equal CD sales by the end of 2010.
iTunes remains in the lead for all music sold in the US at 25 percent of "music units sold," up from 21 percent last year and 14 percent in 2007. Comparatively, Walmart (meshing its online and physical CD sales) remains in second place overall with 14 percent of all music sold, while Best Buy came in third. When looking at only online sales, iTunes made up 69 percent of the digital music market in the first half of 2009 and Amazon MP3 came in second at eight percent.