2025-26
- 4 teams
2023-24
- 3 teams
2022-23
- 3 teams
2021-22
- 3 teams
2020-21
- 4 teams
2019-20
- 5 teams
2018-19
- 4 teams
2016-17
- 3 teams
1984-85
- 1 team
1977-78
- 3 teams
1976-77
- 2 teams
1975-76
- 2 teams
1974-75
- 2 teams
1973-74
- 2 teams
1972-73
- 4 teams
1971-72
- 3 teams
1970-71
- 3 teams
1969-70
- 2 teams
1968-69
- 3 teams
1967-68
- 2 teams
1966-67
- 2 teams
1965-66
- 2 teams
1964-65
- 3 teams
1961-62
- 2 teams
1960-61
- 2 teams
1959-60
- 2 teams
1958-59
- 4 teams
1957-58
- 3 teams
1956-57
- 4 teams
1955-56
- 4 teams
1954-55
- 5 teams
1953-54
- 5 teams
1952-53
- 5 teams
1951-52
- 5 teams
1950-51
- 4 teams
1949-50
- 4 teams
1948-49
- 4 teams
1947-48
- 4 teams
1946-47
- 3 teams
1945-46
- 3 teams
1944-45
- 3 teams
1943-44
- 3 teams
1942-43
- 3 teams
1941-42
- 4 teams
1940-41
- 2 teams
1939-40
- 3 teams
1938-39
- 4 teams
1937-38
- 5 teams
1936-37
- 4 teams
1935-36
- 3 teams
1934-35
- 3 teams
1933-34
- 6 teams
1932-33
- 4 teams
1931-32
- 5 teams
1930-31
- 4 teams
1929-30
- 3 teams
1928-29
- 4 teams
1927-28
- 3 teams
1914-15
- 1 team
1911-12
- 1 team
