Statistics for Longest Serving World Leaders

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Country	Years in Office	Answer	% Correct
North Korea	1948-1994	Kim Il-Sung	98%
United States	1933-1945	Franklin D. Roosevelt	95%
China	1949-1968	Mao Zedong	93%
Cuba	1976-2008	Fidel Castro	87%
United Kingdom	1979-1990	Margaret Thatcher	87%
Russia	2000-'08, 2012-	Vladimir Putin	87%
Spain	1938-1973	Francisco Franco	79%
Italy	1922-1943	Benito Mussolini	74%
Japan	2012-2020	Shinzō Abe	70%
Turkey	1923-1938	Mustafa Kemal Atatürk	66%
Indonesia	1968-1998	Suharto	59%
Argentina	1946-1958	Juan Perón	51%
Egypt	1981-2011	Hosni Mubarak	49%
France	1981-1995	François Mitterrand	46%
Singapore	1959-1990	Lee Kuan Yew	46%
Germany	1982-1998	Helmut Kohl	36%
Canada	1926-'30, 1935-'48	William Lyon Mackenzie King	28%
Australia	1949-1966	Robert Menzies	21%
South Korea	1948-1960	Rhee Syng-man	18%
Greece	1981-'89, 1993-'96	Andreas Papandreou	16%
Brazil	1934-1945	Getúlio Vargas	16%
Mexico	1884-1911	Porfirio Díaz	13%
South Africa	1924-1939	James Barry Munnik Hertzog	11%
Poland	1943-'48, 1956-'70	Władysław Gomułka	8%
Nigeria	1966-1975	Yakubu Gowon	8%
Vietnam	1976-1987	Phạm Văn Đồng	7%
Sweden	1946-1969	Tage Erlander	7%
Netherlands	1982-1994	Ruud Lubbers	5%
New Zealand	1912-1925	William Massey	5%