Era
20th century
6
1945-
2
1958-
2
1974-1981
2
1981-1995
2
1995-2007
2
1485-1603
1
1603-1714
1
16th century
1
1760-1789
1
17th century
1
1837-1901
1
1870-1914
1
18th century
1
1914-1945
1
1915-1997
1
1945-1989
1
1949-
1
1974-
1
1980-
1
19th century
1
German occupation, 1940-1945
1
Revolution, 1974
1
Since 1958
1