Era
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1988-
3
2000-
3
2003-
3
Attempted coup, 1990
3
Since 2000
3
1885-1889
2
1911-1991
2
1913-2006
2
1917-1945
2
1917-1963
2
1923-
2
1923-2005
2
1925-
2
1926-
2
1927-2022
2
1930-
2
1931-2022
2
1936-1953
2
1937-2006
2
1939-2013
2
1947-
2
1948-
2
1949-
2
1953-
2
1954-
2
1955 May 21-
2
1958-
2
1960-
2
1966-
2
1968-
2
1970-1973
2
1974-1977
2
1976-2002
2
1977-1981
2
1978-
2
1979-1997
2
1982-
2
1986-
2
1992-
2
1997-2007
2
1999-
2
2017-
2
American Invasion, 1983
2
Civil War, 1989-1996
2
Civil War, 1999-2003
2
Since 1980
2
Since 1989
2
Since 1991
2
Since 1999
2
1775-1783
1
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