US consumers spent $4.8 billion on Xbox 360 hardware, software and accessories in 2009, according to Microsoft, with $1.1 billion in sales during December alone.
The company also claims $2.7 billion was spent on Xbox 360 games during the year, with the console accounting for a 43 per cent share of third-party sales – or $2.4 billion.
As revealed last week, the console has sold 39 million units worldwide, with an average software attach rate of 8.8 games. The Xbox 360 sold 10 million units globally during 2009*.
The company is bullish on 2010, claiming it will be the "biggest year in Xbox history", as it launches new motion control peripheral Project Natal and exclusive titles such as Alan Wake, Halo: Reach, Tom Clancy's Splinter Cell: Conviction and Crackdown 2.
NPD results show that the Xbox 360 sold 1.31 million units in December, behind rivals Sony and Nintendo.
This originally read: "The Xbox 360 sold 10 million units in the US during 2009", but Microsoft has since issued a correction to the numbers that it published.