Answer:  5 OF THEM!

Theme From SWAT
by Rhythm Heritage
#1 for 1 week

Welcome Back Kotter
by John Sebastian
#1 for 1 week
Happy Days
by Pratt & McClain
peaked at #5
Making Our Dreams Come True
(Theme From Laverne & Shirley)
by Cyndi Grecco
peaked at #25
Baretta's Theme
(Keep Your Eye On The Sparrow)
by Rhythm Heritage
peaked at #20
(sung by Sammy Davis, Jr. on the show)

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