Era
20th century
4
1954-
3
1747-1780
2
1775-1783
2
1868-1963
2
1896-1977
2
1945-2010
2
1973-1988
2
2001-2009
2
Revolution, 1775-1783
2
1876-1938
1
1900-1999
1
1917-1984
1
1941-1979
1
1946-
1
1947-
1
1952-
1
1997-
1
19th century
1
Colonial period, ca. 1600-1775
1
Coup d'état, 1973
1
Coup d'état, 1973
1
Since 1947
1