According to Nintendo and the most recent NPD numbers, the Wii has sold over 20 million units in 31 months.
In 31 months of release the Wii has sold over 20 million units in the United States, according to Nintendo. The most recent NPD numbers confirm this, leading Nintendo to declare the system as "the fastest-selling console in history."
Despite the landmark, the Wii has seen a big sales drop in May's numbers. The Wii remained the top-selling console, but sales dropped in comparison to last year's May numbers. The system went from selling 675,100 units to just 289,500, creating a 57 percent fall. It is worth noting that last year's May numbers were bolstered by the recent release of games such as Wii Fit and Mario Kart Wii, though.
Software sales also proved to be very strong for Nintendo. Six of the top ten best-selling titles in May were from Nintendo, including the aforementioned Wii Fit and Mario Kart Wii. However, EA Sports Active was the only third party game to break into the top ten.
The DS still remained a strong seller thanks to the success of the DSi. Sales of the handheld grew over 40 percent for a total of 633,500 units, with 399,000 of them being DSi sales.