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According to NPD, Xbox 360 sold 1.3 million consoles in December alone, and has steadily widened the gap between Sony’s PlayStation 3 console sales. In December, NPD stated that Sony sold 798,000 PS3 hardware units. Since PS3’s launch in November 2006, Xbox 360 has outsold PS3 by nearly 2:1 on average, bringing a total U.S. Xbox 360 install base of 9.2 million consoles, compared to and installed base of 7.4 million Wii consoles and 3.3 million PS3 consoles.