Speaking to Wired, Nintendo of America head Reggie Fils-Aime has claimed that America gets around 40 percent of all manufactured Wii stock per month, which amounts to around 1.8 million units.
From the site:
"We are passionately upset about the lack of product relative to demand," said Fils-Aime, who hit the points that Nintendo has been reiterating all along about its runaway hit game machine: The production numbers are determined by Nintendo's Japanese parent, and Nintendo of America does its best to remind Japan of the "missed opportunities" when it doesn't have enough product to go around.
Fils-Aime noted that North America gets about 40 percent of the 1.8 million Wii consoles Nintendo manufactures every month. The Americas are the only territory in which supply and demand are out of whack for Wii: Fils-Aime said you can walk into stores in Japan and Europe and find Wii on shelves.
Hit the link for more.