Era
1945-
54
20th century
47
21st century
36
20th century --
19
1990-
12
1989-
10
1960-
8
19th century
8
2000-
8
1971-
7
21st century --
7
1818-1883
6
1981-
6
19th century --
6
1918-1945
4
1946-
4
1947-
4
1955-2011
4
1975-
4
1980-
4
1991-
4
2001-
4
1868-
3
1909-2005
3
1925-
3
1930-
3
1979-
3
1981-1993
3
2001-2009
3
2009-
3
Ottoman Empire, 1288-1918
3
- 632
2
1250-1517
2
1864-1920
2
1918-
2
1926-
2
1937-2009
2
1945
2
1949-
2
1958-
2
1971-1981
2
1971-1990
2
1974-
2
1976-
2
1976-2000
2
1982-
2
1988-
2
1990 -
2
622-661
2
640-1517
2
more ...