Week ending Rank Streak
September 4, 2007 1 1
September 15, 2007 1 2
September 22, 2007 1 3
September 29, 2007 1 4
October 13, 2007 1 5
November 3, 2007 1 6
November 10, 2007 1 7
December 1, 2007 1 8
March 1, 2008 1 9
January 24, 2009 9 10
January 31, 2009 14 11
February 21, 2009 9 12
August 22, 2009 20 13
December 19, 2009 12 14
January 16, 2010 12 15