This site's "America" data includes figures for central and south America, this would be the 500k plus you would get if you add up NPD sales for Canada and the US. I'm pretty sure there has been official numbers for these other areas but i'm not sure if it was 360 data or wii data and they just use estimations to calculate for the other systems.
And if you have full data for these tracking firms and wish to share these numbers with the site so we can produce better numbers then click the "Staff" icon at the bottom of the page and send an email or PM to Brett Walton (ioi).







