I think this the amount of consoles sold in the USA.
Now if someone could find the sales for Japan and Europe.*hint* *hint*
That brings the cumulative installed bases to:
PS2: 16,318,000
XBOX: 4,765,000
GameCube: 3,664,000
GBA: 12,159,000
http://www.nintendojo.com/infocus/vi...php?1045600920