Seasons
Season 1
18 episodes
2006
Season 2
39 episodes
2006
Season 3
8 episodes
2007
Season 4
40 episodes
2007
Season 5
8 episodes
2008
Season 6
35 episodes
2008
Season 7
5 episodes
2009
Season 8
36 episodes
2009
Season 9
6 episodes
2010
Season 10
43 episodes
2010
Season 11
9 episodes
2011
Season 12
37 episodes
2011
Season 13
9 episodes
2012
Season 14
37 episodes
2012
Season 15
38 episodes
2013
Season 16
32 episodes
2014
Season 17
38 episodes
2015
Season 18
34 episodes
2016
Season 19
32 episodes
2017
Season 20
32 episodes
2018
Season 21
29 episodes
Season 22
21 episodes
Season 23
21 episodes