Era
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Revolution, 1917-1921
55
To 1931
55
1917-1963
54
1929
54
2008
54
354-430
54
1918-1933
53
1945-1953
53
1971-
53
1974-
53
1288-1918
52
1835-1910
52
1865-1918
52
1956-
52
500-1500
52
Stuarts, 1603-1714
52
1600-1775
51
1878-1953
51
1959-
51
1963-1969
51
1965-
51
1980-2020
51
1969-1974
50
1976-2002
50
1988-
50
1732-1799
49
1801-1917
49
1944-
49
British occupation, 1765-1947
49
Since 1979
49
1901-1981
48
1926-1984
48
1936-
48
Since 1951
48
Since 1975
48
To 500
48
1483-1546
47
1619-1682
47
1813-1855
47
1889-1945
47
1953-1961
47
1985-1991
47
1642-1649
46
1743-1826
46
Since 1949
46
1596-1650
45
1929-1968
45
1949-1976
45
1961-
45
1998-
45
more ...