Era
1689-1801
1
1801-1917
1
1894-1971
1
1900 - 1999
2
1913-1921
1
1917-1936
1
1918-1945
2
1929-
1
1931-
1
1933-1945
1
1945-
19
1945-1955
1
1945-1989
16
1945-1990
2
1945-1991
3
1945-1992
1
1949-
2
1953-1985
2
1955-1965
1
1968-1989
2
1970-1991
1
1975-1985
1
1976-2002
1
1985-1991
5
1989-
51
1989-1992
1
1989-1993
1
1991-
2
1991--
1
19th century
1
20th century
15
Intervention, 1968
1
Since 1945
3
Since 1989
1
Unification, 1990
2