2020
- 1 team
- 1 brand
2018
- 2 teams
- 1 brand
2017
- 7 teams
- 4 brands
2016
- 9 teams
- 7 brands
2015
- 9 teams
- 5 brands
2014
- 10 teams
- 5 brands
2013
- 7 teams
- 4 brands
2012
- 6 teams
- 6 brands
2011
- 5 teams
- 5 brands
1988
- 1 team
- 1 brand
1986
- 1 team
- 1 brand
1985
- 1 team
- 1 brand
1984
- 5 teams
- 3 brands
1983
- 8 teams
- 3 brands
1982
- 9 teams
- 5 brands
1981
- 16 teams
- 6 brands
1980
- 17 teams
- 3 brands
1979
- 19 teams
- 7 brands
1978
- 16 teams
- 9 brands
1977
- 12 teams
- 6 brands
1976
- 13 teams
- 5 brands
1975
- 11 teams
- 9 brands
1974
- 8 teams
- 4 brands
1973
- 4 teams
- 3 brands
1972
- 2 teams
- 2 brands
1971
- 2 teams
- 3 brands
1970
- 1 team
- 1 brand
1969
- 1 team
- 1 brand
1968
- 3 teams
- 3 brands
1967
- 2 teams
- 2 brands
