Nintendo's past Decembers with the Wii:
2006 - 604K
2007 - 1350K
2008 - 2150K
2009 - 3810K
2010 - 2355K
2011 - 1060K
2012 - 472K
Nintendo's past Decembers with the GameCube:
2001 - 573K
2002 - 590K
2003 - 1158K
2004 - 796K
2005 - 606K
WiiU not too far off GC.
Predictions for LT console sales:
PS4: 120M
XB1: 70M
WiiU: 14M
3DS: 60M
Vita: 13M