Season
- Season 18 1974-05-15
- Season 17 1973-09-11
- Season 16 1972-08-22
- Season 15 1971-08-03
- Season 14 1970-06-08
- Season 13 1969-01-06
- Season 12 1968-02-03
- Season 11 1967-01-28
- Season 10 1965-12-04
- Season 9 1964-09-13
- Season 8 1963-09-01
- Season 7 1962-09-02
- Season 6 1961-09-10
- Season 5 1960-09-11
- Season 4 1959-09-13
- Season 3 1958-09-14
- Season 2 1957-09-08
- Season 1 1956-07-08
- Season 0
