2025
- 1 team
- 1 brand
2024
- 20 teams
- 11 brands
2023
- 20 teams
- 9 brands
2022
- 20 teams
- 10 brands
2021
- 21 teams
- 7 brands
2020
- 20 teams
- 10 brands
2019
- 20 teams
- 11 brands
2018
- 20 teams
- 8 brands
2017
- 20 teams
- 7 brands
2016
- 20 teams
- 11 brands
2015
- 20 teams
- 10 brands
2014
- 20 teams
- 8 brands
2013
- 20 teams
- 11 brands
2012
- 20 teams
- 12 brands
2011
- 20 teams
- 12 brands
2010
- 20 teams
- 14 brands
2009
- 20 teams
- 12 brands
2008
- 20 teams
- 11 brands
2007
- 20 teams
- 12 brands
2006
- 20 teams
- 14 brands
2005
- 22 teams
- 11 brands
2004
- 24 teams
- 13 brands
2003
- 24 teams
- 11 brands
2002
- 26 teams
- 9 brands
2001
- 28 teams
- 11 brands
2000
- 25 teams
- 11 brands
1999
- 22 teams
- 8 brands
1998
- 25 teams
- 10 brands
1997
- 26 teams
- 13 brands
1996
- 24 teams
- 10 brands
1995
- 24 teams
- 10 brands
1994
- 24 teams
- 11 brands
1993
- 31 teams
- 11 brands
1992
- 20 teams
- 8 brands
1991
- 20 teams
- 8 brands
1990
- 19 teams
- 8 brands
1989
- 21 teams
- 10 brands
1988
- 22 teams
- 9 brands
1987
- 23 teams
- 8 brands
1986
- 29 teams
- 10 brands
1985
- 25 teams
- 9 brands
1984
- 22 teams
- 7 brands
1983
- 23 teams
- 7 brands
1982
- 23 teams
- 8 brands
1981
- 18 teams
- 7 brands
1980
- 17 teams
- 6 brands
1979
- 23 teams
- 8 brands
1978
- 25 teams
- 9 brands
1977
- 22 teams
- 9 brands
1976
- 14 teams
- 6 brands
1975
- 9 teams
- 3 brands
1974
- 15 teams
- 5 brands
1973
- 11 teams
- 3 brands
1972
- 14 teams
- 4 brands
1971
- 13 teams
- 5 brands
1970
- 9 teams
- 2 brands
1969
- 8 teams
- 6 brands
1968
- 6 teams
- 3 brands
1967
- 5 teams
- 3 brands
1965
- 1 team
- 1 brand
1964
- 1 team
- 1 brand
1963
- 2 teams
- 2 brands
1962
- 3 teams
- 3 brands
1961
- 1 team
- 1 brand
1960
- 2 teams
- 1 brand
1959
- 2 teams
- 2 brands
