2024-25
- 20 teams
2024
- 4 teams
2023-24
- 21 teams
2023
- 6 teams
2022-23
- 11 teams
2022
- 4 teams
2021-22
- 15 teams
2021
- 5 teams
2020-21
- 9 teams
2020
- 3 teams
2019-20
- 7 teams
2019
- 4 teams
2018-19
- 6 teams
2017-18
- 4 teams
2017
- 2 teams
2016-17
- 2 teams
2016
- 2 teams
2015-16
- 3 teams
2015
- 2 teams
2014
- 4 teams
2013
- 3 teams
2012
- 4 teams
2011-12
- 2 teams
2011
- 4 teams
2010-11
- 4 teams
2010
- 3 teams
2009-10
- 6 teams
2009
- 2 teams
2008-09
- 6 teams
2007-08
- 9 teams
2006-07
- 9 teams
2005-06
- 13 teams
2005
- 3 teams
2004-05
- 15 teams
2004
- 9 teams
2003-04
- 21 teams
2003
- 5 teams
2002-03
- 21 teams
2002
- 4 teams
2001-02
- 19 teams
2001
- 4 teams
2000-01
- 16 teams
2000
- 4 teams
1999-00
- 14 teams
1999
- 4 teams
1998-99
- 16 teams
1998
- 4 teams
1997-98
- 21 teams
1997
- 2 teams
1996-97
- 28 teams
1996
- 4 teams
1995-96
- 18 teams
1995
- 4 teams
1994
- 6 teams
1993
- 6 teams
1992
- 3 teams
1989
- 13 teams
1988-89
- 3 teams
1988
- 14 teams
1987-88
- 8 teams
1987
- 10 teams
1986-87
- 11 teams
1986
- 10 teams
1985-86
- 14 teams
1985
- 12 teams
1984-85
- 19 teams
1984
- 10 teams
1983-84
- 21 teams
1983
- 8 teams
1982-83
- 22 teams
1982
- 10 teams
1981-82
- 19 teams
1981
- 3 teams
1980-81
- 13 teams
1980
- 5 teams
1979-80
- 10 teams
1978-79
- 9 teams
1978
- 1 team
1977-78
- 9 teams
1976-77
- 9 teams
1975-76
- 10 teams
1974-75
- 13 teams
1974
- 1 team
1973-74
- 20 teams
1973
- 1 team
1972-73
- 17 teams
1972
- 1 team
1971-72
- 12 teams
1970-71
- 8 teams
1969-70
- 7 teams
1968-70
- 1 team
1968-69
- 3 teams
1967
- 1 team
1964-65
- 3 teams
