Era
20th century
12
1989-
3
1945-1991
2
1949-
2
1974-
2
1989-1994
2
World War, 1939-1945
2
1801-1917
1
1891-1969
1
1892-1980
1
1919-1992
1
1920-1995
1
1925-1953
1
1936-
1
1937-
1
1941-1979
1
1945-
1
1945-1989
1
1946-1973
1
1953-1985
1
1960-
1
1960-1980
1
1960-1991
1
1973-1993
1
1979-
1
1981-
1
1991-
1
1993-
1
1994-
1
19th century
1
Civil War, 1975-
1
Independence and Civil War, 1975-1994
1
Soviet occupation, 1979-1989
1