Do you know what the most-watched TV show is? The most popular network programs tend to hit No. 1 and stay there for several years -- take the ratings domination of "American Idol" from 2003 until 2011, when it was overtaken by Sunday Night Football. Check out the TV shows that have topped the ratings for each year dating back to 1971, according to their Nielsen ratings. Some might surprise you.

Credit: Handout

"All in the Family" (No. 1 from 1971-76)

Credit: Handout

"Happy Days" (No. 1 from 1976-77)

"Laverne & Shirley" (1976-83)

Credit: AP

Marshall created the TV stories "Laverne & Shirley" which featured his sister, Penny Marshall.

Credit: CBS

"60 Minutes" (No. 1 from 1979-80; 1982-83; 1991-94)

Credit: AP

"Dallas" (No. 1 from 1980-1982 and 1983-84)

Credit: AP

"Dynasty" (No. 1 from 1984-85)

Credit: NBC

"The Cosby Show" (No. 1 from 1985-90)

Credit: AP

"Roseanne" (No. 1 from 1989-90, tied with "The Cosby Show")

Credit: AP

"Cheers" (No. 1 from 1990-1991)

Credit: NBC

"Seinfeld" (No. 1 from 1994-95 and 1997-98)

Credit: AP

"ER" (No. 1 from 1995-97 and 1998-99)

Credit: AP

"Who Wants to Be a Millionaire" (No. 1 from 1999-2000)

Credit: AP

"Survivor" (No. 1 from 2000-01)

Credit: AP

"Friends" (No. 1 from 2001-02)

Credit: AP

"CSI" (No. 1 from 2002-03)

Credit: AP

"American Idol" (No. 1 from 2003-11)

Credit: AP

Sunday Night Football (No. 1 from 2011-12)

Credit: CBS

"NCIS" (No. 1 from 2012-13)

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