http://www.gametrailers.com/side-mission/2012/04/26/nintendo-reports-first-ever-annual-operating-loss/
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Summing up: Nintendo expected to sell 13 million Wiis but only sold 9.8 million; it expected to sell 16 million 3DS' but only sold 13.5 million; it expected to sell 11 million DS' but only sold half that many.
Software sales were also down about 35%.