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