Interesting, though the PS2 has been around a whole lot longer. I don't think the numbers were counted from the first year the PS2 shipped, but rather it's grand total...

Having played a bit of both the Wii and the PS2, I think I prefer the "sit-down" console, just due to my being prone to breaking things, and coordination "issues"... (There was a reason I ran track when I was forced to pick a sport... )