2009-10
- 9 Teams
2008-09
- 6 Teams
2007-08
- 5 Teams
2006-07
- 2 Teams
1993-94
- 6 Teams
1992-93
- 11 Teams
1991-92
- 18 Teams
1990-91
- 11 Teams
1989-90
- 10 Teams
1988-89
- 7 Teams
1987-88
- 2 Teams
1986-87
- 2 Teams
1985-86
- 3 Teams
1984-85
- 3 Teams
1983-84
- 5 Teams
1982-83
- 6 Teams
1981-82
- 5 Teams
1980-81
- 5 Teams
1979-80
- 12 Teams
1978-80
- 1 Team
1978-79
- 18 Teams
1977-78
- 12 Teams
1976-77
- 12 Teams
1975-76
- 8 Teams
1975
- 1 Team
1974-75
- 5 Teams
1973-74
- 5 Teams
1972-73
- 7 Teams
1971
- 1 Team
1970-71
- 3 Teams
1968-69
- 3 Teams
1968
- 1 Team
1967-68
- 3 Teams
1966-67
- 2 Teams
1965-67
- 1 Team
1965-66
- 2 Teams
1964
- 1 Team
1963-65
- 1 Team
1963-64
- 1 Team
1961-63
- 1 Team
1960-61
- 1 Team
1960
- 1 Team
1958
- 1 Team
1957-60
- 1 Team
1933-57
- 1 Team
1932-33
- 1 Team
1931-32
- 1 Team
1930-31
- 1 Team
