Digital games and downloadable content sales are growing at a rate of 33 percent year over year in the US and Europe, according to data presented by NPD, iResearch and Digi-Capital analysts at GDC. The speakers at the digital games sales talk noted that sales in China are expected to grow over 10 percent every year for the next three years.

According to GamesIndustry International, NPD analyst Liam Callahan told attendees that digital game content sales in 2012 reached $5.9 billion in the United States. Sales in the UK reached $1.7 billion, followed by Germany with $1.4 billion and France with $1 billion. Callahan also said that digital content composes 40 percent of the United States' total spend on games, an increase from 28 percent in 2010.

NPD estimated that 48 percent ($7.1 billion) of the $14.8 billion spent on games in the US in 2012 came from purchases on brand new games at retail. The other 51 percent was from digital games and downloadable content ($2.22 billion), mobile game sales ($2.11 billion), used game sales ($1.59 billion), subscriptions ($1.05 billion), social network gaming ($544 million) and rentals ($198 million). The NPD also reported a drop in used game sales from 2011 by 17.1 percent.

This article was originally published on Joystiq.