Statistics for Longest Running TV Shows A - Z

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letter	years	show	% Correct
S	1989 - present	The Simpsons	83%
X	1993 - 2002	The X-Files	57%
F	1999 - present	Family Guy	52%
B	1959 - 1973	Bonanza	43%
D	1978 - 1991	Dallas	40%
E	1994 - 2009	ER	38%
L	1990 - 2010	Law & Order	35%
C	2000 - 2015	CSI: Crime Scene Investigation	33%
N	2003 - present	NCIS	33%
G	1955 - 1975	Gunsmoke	30%
Q	1976 - 1983	Quincy, M.E.	25%
R	1988 - 1997	Roseanne	23%
H	1968 - 1980	Hawaii Five-O	22%
O	2005 - 2013	The Office	20%
W	1972 - 1981	The Waltons	20%
K	1979 - 1993	Knot's Landing	17%
M	1960 - 1972	My Three Sons	13%
A	1952 - 1966	The Adventures of Ozzie and Harriet	13%
Z	1957 - 1959	Zorro	13%
P	1957 - 1966	Perry Mason	10%
T	2003 - 2015	Two and a Half Men	10%
I	1967 - 1975	Ironside	8%
V	1962 - 1971	The Virginian	7%
Y	2000 - 2006	Yes, Dear	3%
J	1950 - 1965	The Jack Benny Program	2%
U	1953 - 1963	The United States Steel Hour	2%