The Wii's decline, which stands at a cumulative -21.2% in this year, is due to its originally high shipment numbers and is therefore solely responsible for this decline. Both the Xbox 360 and the PS3 have posted solid cumulative gains of 54.1% and 44.8%, respectively. The Xbox 360 has now outsold the Wii for the past four months in the U.S. and the PS3 isn't far from catching up to the Wii.
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