Era
1980-1989
12
20th century
8
1989-
7
1945-1980
4
1918-1945
3
1981-1990
3
1930-2004
2
1945-1989
2
1990-
2
19th century
2
1569-1795
1
1572-1763
1
1796-1918
1
17th century
1
1867-1935
1
18th century
1
1918-2008
1
1921-1923
1
1923-1929
1
1929-1933
1
1945-1953
1
1945-1981
1
1953-1985
1
21st century
1
Intervention, 1968
1
Revolution, 1956
1