Ended
IMDb
Seasons
Season 1 (1972)3
Season 2 (1973)6
Season 3 (1974)13
Season 4 (1975)14
Season 5 (1976)13
Season 6 (1977)14
Season 7 (1978)12
Season 8 (1979)13
Season 9 (1980)12
Season 10 (1981)14
Season 11 (1982)12
Season 12 (1983)13
Season 13 (1984)13
Season 14 (1985)13
Season 15 (1986)13
Season 16 (1987)10
