When will Wii U pass up GameCube?

[drake_tolu]

The real sales GC is:

2,25m 2001
7,08m 2002
13,4m 2003
17,58m 2004
20,32m 2005
21,33m 2006
21,52m 2007

I think that Wii U will pass GameCube by september 2015.