2024
- 6 teams
2023
- 3 teams
2022
- 3 teams
2021
- 3 teams
2019-20
- 3 teams
2018-19
- 3 teams
2018
- 2 teams
2017-18
- 4 teams
2017
- 2 teams
2016-17
- 5 teams
2016
- 4 teams
2015-16
- 5 teams
2015
- 4 teams
2014-15
- 3 teams
2014
- 3 teams
2013-14
- 8 teams
2013
- 3 teams
2012-13
- 7 teams
2011-12
- 5 teams
2011
- 1 team
2010-11
- 6 teams
2010
- 1 team
2009-10
- 3 teams
2009
- 1 team
2008-09
- 5 teams
2007-08
- 5 teams
2007
- 1 team
2006-07
- 5 teams
2005-06
- 9 teams
2004-05
- 6 teams
2003-04
- 5 teams
2002-03
- 6 teams
2000-01
- 4 teams
1999-00
- 2 teams
1998-99
- 4 teams
1997-98
- 3 teams
1988-89
- 2 teams
1981
- 1 team
