What was the top-rated TV program in 1990?

“Roseanne” (ABC, 1988) was the top-rated TV program in 1990.

What was the top-rated TV program in 1950? "Texaco Star Theater" (NBC, 1948-56) was the top-rated TV program…
What was the top-rated TV program in 1970? "Marcus Welby, M.D." (ABC, 1969-76) was the top-rated TV program…
What was the top-rated TV show in 1960? "Gunsmoke" (CBS, 1955-75) was the top-rated TV show in 1960.
What was the top-rated TV series in 1980? "Dallas" (CBS, 1978-91) was the top-rated TV series in 1980.
What are the names of the seven original astronauts in the American space program? The seven original astronauts in the American space program were:…
What was the title of the sequel to the X-rated Swedish movie I Am Curious (Yellow) (1969)? I Am Curious (Blue) (1970) was the sequel to the…