Era
1878-1953
1
1892-1971
2
1900 - 1999
1
1900-1999
5
1918-1945
2
1944-1989
1
1945-
1
1945-1980
1
1945-1982
1
1945-1989
1968-1989
1
1969-
1
1976-2000
2
1976-2002
2
1980-
1
1980-1989
4
1982-
1
1989-
7
1989-1993
1
20th century
16
Intervention, 1968
2
Revolution, 1918-1919
2
Revolution, 1956
6
Since 1900
1