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