Season 1
9 episodes
May 20, 2003 - July 15, 2003
Season 2
12 episodes
January 13, 2004 - May 11, 2004
Season 3
14 episodes
September 22, 2004 - March 1, 2005
Season 4
14 episodes
March 2, 2005 - May 24, 2005
Season 5
14 episodes
September 21, 2005 - December 14, 2005
Season 6
13 episodes
March 8, 2006 - May 17, 2006
Season 7
13 episodes
September 20, 2006 - December 6, 2006
Season 8
13 episodes
February 28, 2007 - May 16, 2007
Season 9
13 episodes
September 19, 2007 - December 12, 2007
Season 10
13 episodes
February 20, 2008 - May 14, 2008
Season 11
13 episodes
September 3, 2008 - November 19, 2008
Season 12
13 episodes
March 4, 2009 - May 13, 2009
Season 13
13 episodes
September 9, 2009 - November 18, 2009
Season 14
12 episodes
March 10, 2010 - May 19, 2010
Season 15
13 episodes
September 8, 2010 - December 1, 2010
Season 16
13 episodes
February 23, 2011 - May 18, 2011
Season 17
13 episodes
September 14, 2011 - December 7, 2011
Season 18
13 episodes
February 29, 2012 - May 30, 2012
Season 19
13 episodes
August 24, 2012 - November 16, 2012
Season 20
16 episodes
August 2, 2013 - November 15, 2013
Season 21
16 episodes
August 18, 2014 - December 5, 2014
Season 22
16 episodes
August 5, 2015 - December 4, 2015
Season 23
15 episodes
December 12, 2016 - March 8, 2017
Season 24
15 episodes
January 9, 2018 - April 11, 2018
