2022-23
- 7 teams
2022
- 4 teams
2021-22
- 6 teams
2020-21
- 16 teams
2020
- 3 teams
2019-20
- 5 teams
2019
- 1 team
2018-19
- 4 teams
2018
- 4 teams
2017-18
- 4 teams
2016-17
- 5 teams
2016
- 3 teams
2015-16
- 5 teams
2015
- 6 teams
2014-15
- 4 teams
2014
- 8 teams
2013-14
- 10 teams
2013
- 6 teams
2012-13
- 6 teams
2012
- 6 teams
2011-12
- 8 teams
2011
- 2 teams
2010-11
- 5 teams
2010
- 4 teams
2009-10
- 13 teams
2009
- 7 teams
2008-09
- 20 teams
2008
- 10 teams
2007-08
- 19 teams
2007
- 13 teams
2006-07
- 18 teams
2006
- 20 teams
2005-06
- 19 teams
2005
- 11 teams
2004-05
- 14 teams
2004
- 6 teams
2003-04
- 14 teams
2003
- 5 teams
2002-03
- 10 teams
2002
- 4 teams
2001-02
- 7 teams
2001
- 5 teams
2000-01
- 12 teams
1999-00
- 12 teams
1998-99
- 16 teams
1998
- 6 teams
1997-99
- 1 team
1997-98
- 8 teams
1997
- 7 teams
1996-99
- 1 team
1996-97
- 11 teams
1996
- 7 teams
1995-96
- 11 teams
1995
- 3 teams
1994-95
- 13 teams
1993-94
- 11 teams
1992-93
- 9 teams
1992
- 3 teams
1991-92
- 9 teams
1989-90
- 3 teams
1988
- 1 team
1985-86
- 1 team
1984-85
- 1 team
1981-83
- 1 team
