2022
- 5 teams
2021
- 4 teams
2020
- 3 teams
2019
- 7 teams
2018
- 8 teams
2017
- 10 teams
2016
- 9 teams
2015
- 6 teams
2014
- 3 teams
2013
- 6 teams
2012
- 4 teams
2011
- 4 teams
2009
- 5 teams
2008
- 5 teams
2007
- 4 teams
2006
- 4 teams
2005
- 5 teams
2004
- 4 teams
2003
- 3 teams
2000
- 3 teams
1992
- 3 teams
1982
- 4 teams
1981
- 4 teams
1980
- 3 teams
1975
- 4 teams
1974
- 5 teams
1973
- 2 teams
1972
- 2 teams
1971
- 2 teams
1967
- 1 team
1966
- 2 teams
1965
- 2 teams
1964
- 2 teams
