1991-92
- 23 teams
- 11 brands
1990-91
- 24 teams
- 9 brands
1989-90
- 24 teams
- 8 brands
1988-89
- 24 teams
- 11 brands
1987-88
- 25 teams
- 17 brands
1986-87
- 24 teams
- 13 brands
1985-86
- 23 teams
- 13 brands
1984-85
- 23 teams
- 12 brands
1983-84
- 22 teams
- 11 brands
1982-83
- 22 teams
- 11 brands
1981-82
- 22 teams
- 8 brands
1980-81
- 22 teams
- 8 brands
1979-80
- 11 teams
- 4 brands
1978-79
- 14 teams
- 4 brands
1977-78
- 9 teams
- 4 brands
1976-77
- 7 teams
- 5 brands
1975-77
- 1 team
- 1 brand
1975-76
- 3 teams
- 2 brands
1974-77
- 1 team
- 1 brand
1974-75
- 4 teams
- 1 brand
1972-74
- 1 team
- 1 brand
1972-73
- 2 teams
- 2 brands
1971-72
- 3 teams
- 1 brand
1969-71
- 1 team
- 1 brand
1969-70
- 2 teams
- 1 brand
1968-72
- 1 team
- 1 brand
1968-69
- 2 teams
- 2 brands
1966-68
- 2 teams
- 1 brand
1965-66
- 1 team
- 1 brand
1963-65
- 1 team
- 1 brand
1961-63
- 1 team
- 1 brand
1960-61
- 1 team
- 1 brand
1959-60
- 2 teams
- 1 brand
