Era
1945-
42
20th century
40
21st century
30
20th century --
17
1989-
10
1990-
10
1960-
7
19th century
7
19th century --
6
2000-
6
21st century --
6
1818-1883
5
1981-
5
1918-1945
4
1946-
4
1975-
4
2001-
4
1868-
3
1925-
3
1930-
3
1947-
3
1955-2011
3
1971-
3
1979-
3
1980-
3
1981-1993
3
1991-
3
Ottoman Empire, 1288-1918
3
- 632
2
1250-1517
2
1864-1920
2
1918-
2
1926-
2
1937-2009
2
1949-
2
1958-
2
1971-1981
2
1974-
2
1976-
2
1976-2000
2
1988-
2
2009-
2
622-661
2
640-1517
2
6th cent. B. C.
2
1332-1406
1
1469-1527
1
1517-
1
1517-1882
1
17th century --
1
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