2023-24
- 2 teams
2022-23
- 2 teams
2021-22
- 6 teams
2020-21
- 6 teams
2019-20
- 3 teams
2018-19
- 4 teams
2017-18
- 6 teams
2016-17
- 5 teams
2015-16
- 2 teams
2014-15
- 2 teams
2013-14
- 4 teams
2012-13
- 5 teams
2011-12
- 3 teams
2010-11
- 4 teams
2009-10
- 5 teams
2008-09
- 5 teams
2007-08
- 2 teams
2006-07
- 2 teams
2003-04
- 1 team
1979-80
- 1 team
