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2025
- 32 teams
- 1 brand
2024
- 32 teams
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2023
- 32 teams
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2022
- 32 teams
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2021
- 32 teams
- 1 brand
2020
- 32 teams
- 1 brand
2019
- 32 teams
- 1 brand
2018
- 32 teams
- 1 brand
2017
- 32 teams
- 1 brand
2016
- 32 teams
- 1 brand
2015
- 32 teams
- 1 brand
2014
- 32 teams
- 1 brand
2013
- 32 teams
- 1 brand
2012
- 32 teams
- 1 brand
2011
- 32 teams
- 2 brands
2010
- 32 teams
- 1 brand
2009
- 32 teams
- 1 brand
2008
- 32 teams
- 1 brand
2007
- 32 teams
- 1 brand
2006
- 32 teams
- 1 brand
2005
- 32 teams
- 1 brand
2004
- 32 teams
- 1 brand
2003
- 32 teams
- 1 brand
2002
- 32 teams
- 1 brand
2001
- 31 teams
- 2 brands
2000
- 31 teams
- 4 brands
1999
- 31 teams
- 3 brands
1998
- 30 teams
- 6 brands
1997
- 30 teams
- 4 brands
1996
- 30 teams
- 6 brands
1995
- 30 teams
- 6 brands
1994
- 28 teams
- 5 brands
1993
- 28 teams
- 5 brands
1992
- 28 teams
- 6 brands
1991
- 28 teams
- 8 brands
1990
- 28 teams
- 5 brands
1989
- 28 teams
- 4 brands
1988
- 28 teams
- 4 brands
1987
- 27 teams
- 4 brands
1986
- 28 teams
- 4 brands
1985
- 28 teams
- 5 brands
1984
- 28 teams
- 4 brands
1983
- 28 teams
- 5 brands
1982
- 28 teams
- 6 brands
1981
- 26 teams
- 8 brands
1980
- 27 teams
- 8 brands
1979
- 27 teams
- 7 brands
1978
- 28 teams
- 6 brands
1977
- 28 teams
- 6 brands
1976
- 27 teams
- 6 brands
1975
- 26 teams
- 6 brands
1974
- 24 teams
- 6 brands
1973
- 25 teams
- 6 brands
1972
- 24 teams
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1971
- 25 teams
- 8 brands
1970
- 24 teams
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1969
- 14 teams
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1968
- 17 teams
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1967
- 18 teams
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1966
- 17 teams
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1965
- 16 teams
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1964
- 17 teams
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1963
- 17 teams
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1962
- 16 teams
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1961
- 16 teams
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1960
- 15 teams
- 6 brands
1959
- 10 teams
- 3 brands
1958
- 9 teams
- 4 brands
1957
- 9 teams
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1956
- 8 teams
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1955
- 6 teams
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1954
- 9 teams
- 3 brands
1953
- 9 teams
- 3 brands
1952
- 8 teams
- 3 brands
1951
- 7 teams
- 3 brands
1950
- 7 teams
- 3 brands
1949
- 5 teams
- 3 brands
1948
- 5 teams
- 3 brands
1947
- 4 teams
- 3 brands
1946
- 2 teams
- 2 brands
1945
- 1 team
- 1 brand
1944
- 1 team
- 1 brand
1943
- 1 team
- 1 brand
1940
- 1 team
- 1 brand
1936
- 1 team
- 1 brand
1933
- 1 team
- 1 brand
1932
- 1 team
- 1 brand
1929
- 1 team
- 1 brand
1925
- 1 team
- 1 brand
1920
- 1 team
- 1 brand
