2023-24
- 20 teams
2023
- 3 teams
2022-23
- 23 teams
2022
- 2 teams
2021-22
- 9 teams
2021
- 3 teams
2020-21
- 16 teams
2019-20
- 7 teams
2018-19
- 10 teams
2017-18
- 9 teams
2016-17
- 11 teams
2015-16
- 11 teams
2015
- 1 team
2014-15
- 7 teams
2013-14
- 7 teams
2012-13
- 10 teams
2012
- 1 team
2011-12
- 2 teams
2010-11
- 7 teams
2009-10
- 2 teams
2008-09
- 8 teams
2008
- 2 teams
2007-08
- 7 teams
2007
- 1 team
2006-07
- 3 teams
2005-06
- 4 teams
2004-05
- 4 teams
2003-04
- 7 teams
2002-03
- 7 teams
2002
- 3 teams
2001-02
- 12 teams
2000-01
- 9 teams
1999-00
- 11 teams
1999
- 1 team
1998-99
- 6 teams
1997-98
- 7 teams
1996-97
- 7 teams
1995-96
- 3 teams
1994-95
- 2 teams
1993-94
- 6 teams
1993
- 1 team
1992-93
- 10 teams
1991-92
- 3 teams
1989-90
- 6 teams
1988-89
- 3 teams
1988
- 1 team
1987-88
- 7 teams
1987
- 1 team
1986-87
- 9 teams
1985-86
- 9 teams
1984-85
- 11 teams
1983-84
- 13 teams
1982-83
- 10 teams
1981-82
- 5 teams
1981
- 1 team
