For the record, here are positions 11 through 20:
11. Wheel Of Fortune, NBC at 11 AM ET, January 3, 1983 - June 30, 1989 (6 years, 6 months)
12. You Don't Say!, NBC at 3:30 PM ET, April 1, 1963 - September 26, 1969, (6 years, 6 months--just short of Wheel by 2 days)
13. Do You Trust Your Wife?/Who Do You Trust?, ABC at 3:30 PM ET, November 18, 1957 - December 27, 1963 (6 years, 1 month)
14. Password, CBS at 2 PM ET, October 2, 1961 - September 15, 1967 (5 years, 11 months)
15. To Tell The Truth, CBS at 3 PM ET, December 31, 1962 to September 8, 1968 (5 years, 8 months)
16. The $25,000 Pyramid, CBS at 10 AM ET, September 20, 1982 - December 31, 1987 (5 years, 3 months)
17. Concentration, NBC at 11:30 AM ET, August 25, 1958 - September 6, 1963 (5 years)
18. The Dating Game, ABC at 2:30 PM ET, July 15, 1968 - July 6, 1973 (5 years--short of Concentration by 9 days)
19. Super Password, NBC at 12 Noon ET, September 24, 1984 - March 24, 1989 (4 years, 6 months)
20. The Who, What or Where Game, NBC at 12:30 PM ET, December 29, 1969 - January 4, 1974 (4 years)