Era
20th century
18
1970-1973
17
1973-1988
12
1900-1999
10
1973-
7
1908-1973
6
Coup d'état, 1973
6
1988-
5
Since 1970
4
1920-1970
3
21st century
3
2000-2099
2
Since 1973
2
1800-1830
1
1800-1899
1
1824-1920
1
1918-2013
1
1941-
1
1959-1990
1
1970-
1
1980-
1
19th century
1
20st century
1
February Revolution, 1848
1
Insurrection, 1851
1
Since 1900
1
Since 1988
1