Era
1801-1917
1
1812-1870
1
1878-1953
7
1879-1940
2
1890-1986
1
1894-1917
1
1894-1971
3
1899-1953
1
1900-1999
5
1917-1936
8
1917-1953
1
1917-1970
1
1921-
1
1923-2005
2
1925-1953
1
1931-2007
2
1933-
1
1933-1945
1
1936-1953
10
1945-
2
1945-1989
1
1945-1991
2
1945-1992
2
1946-
1
1950-
1
1953-1985
13
1953-1991
1
1953-2007
1
1958-
1
1965-1975
1
1968-1989
2
1974-
1
1975-1985
2
1985-1991
22
1988-
1
1989-
1
1991-
7
19th century
1
20th century
8
21st century
1
Attempted coup, 1991
1
Intervention, 1968
2
Since 1945
2
Since 1953
1
Since 1985
1
Since 1988
1
World War, 1939-1945
1