Season
- Season 18 1997-03-16
- Season 17 1991-04-22
- Season 16 1990-03-19
- Season 15 1988-03-13
- Season 14 1987-02-07
- Season 13 1986-01-11
- Season 12 1985-01-21
- Season 11 1984-01-23
- Season 10 1983-01-22
- Season 9 1982-12-28
- Season 8 1981-04-06
- Season 7 1980-03-24
- Season 6 1979-12-17
- Season 5 1978-03-25
- Season 4 1977-06-27
- Season 3 1976-02-02
- Season 2 1975-03-17
- Season 1 1973-06-30
