with 6 episodes premiered on February 16, 1991

with 13 episodes premiered on January 12, 1971

with 24 episodes premiered on September 18, 1971

with 24 episodes premiered on September 16, 1972

with 24 episodes premiered on September 15, 1973

with 25 episodes premiered on September 14, 1974

with 24 episodes premiered on September 8, 1975

with 25 episodes premiered on September 22, 1976

with 24 episodes premiered on October 2, 1977

with 27 episodes premiered on September 24, 1978