2022
- 32 teams
2021-22
- 56 teams
2021
- 41 teams
2020-21
- 50 teams
2020
- 35 teams
2019-20
- 40 teams
2019
- 35 teams
2018-19
- 32 teams
2017-18
- 29 teams
2017
- 26 teams
2016-17
- 23 teams
2016
- 27 teams
2015-16
- 16 teams
2015
- 25 teams
2014-15
- 12 teams
2014
- 25 teams
2013-14
- 5 teams
2013
- 17 teams
2012-13
- 21 teams
2012
- 27 teams
2011-12
- 20 teams
2011
- 22 teams
2010-11
- 24 teams
2010
- 25 teams
2009-10
- 23 teams
2009
- 25 teams
2008-09
- 25 teams
2008
- 20 teams
2007-08
- 31 teams
2007
- 20 teams
2006-07
- 23 teams
2006
- 21 teams
2005-06
- 22 teams
2005
- 19 teams
2004-05
- 22 teams
2004
- 22 teams
2003-04
- 21 teams
2003
- 19 teams
2002-03
- 27 teams
2002
- 19 teams
2001-02
- 20 teams
2001
- 12 teams
2000-01
- 20 teams
2000
- 13 teams
1999-00
- 26 teams
1999
- 12 teams
1998-99
- 26 teams
1998
- 15 teams
1997-98
- 20 teams
1997
- 15 teams
1996-97
- 23 teams
1996
- 13 teams
1995-96
- 24 teams
1995
- 10 teams
1994-95
- 26 teams
1994
- 16 teams
1993-94
- 30 teams
1993
- 7 teams
1992-93
- 30 teams
1992
- 13 teams
1991-92
- 28 teams
1991
- 4 teams
1990-91
- 25 teams
1990
- 9 teams
1989-90
- 23 teams
1989
- 2 teams
1988-89
- 19 teams
1988
- 5 teams
1987-88
- 15 teams
1986-87
- 11 teams
1986
- 2 teams
1985-86
- 13 teams
1984-85
- 18 teams
1983-84
- 17 teams
1982-83
- 11 teams
1981-82
- 10 teams
1980-81
- 11 teams
1980
- 3 teams
1979-80
- 11 teams
1978-79
- 19 teams
1977-78
- 18 teams
1976-77
- 21 teams
1975-76
- 18 teams
1974-75
- 13 teams
1974
- 3 teams
1973-74
- 7 teams
1973
- 1 team
1972-74
- 1 team
1972-73
- 9 teams
1971-72
- 9 teams
