March 1970-September 1970
Nielsen Rating: 5.7
Share: 20%

September 1970-September 1971
Nielsen Rating: 7.0
Share: 22%

September 1971-September 1972
Nielsen Rating: 6.5
Share: 21%

September 1972-September 1973
Nielsen Rating: 6.8
Share: 21%

September 1973-September 1974
Nielsen Rating: 6.1
Share: 19%

September 1974-September 1975
Nielsen Rating: 6.0
Share: 18%

September 1975-September 1976
Nielsen Rating: 5.9
Share: 18%