Era
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1810-
8
1945-1980
8
1977-
8
Since 1980
8
Since 1990
8
1600-1799
7
1800-1918
7
1864-1910
7
1878-1912
7
1900-2099
7
1914-1945
7
1945-1960
7
1947-
7
1992-
7
Since 1975
7
To 1957
7
1700-1799
6
1775-1783
6
1798-1942
6
1853-1895
6
1858-1945
6
1910-1943
6
1910-1946
6
1912-1949
6
1917-1948
6
1918-1938
6
1946-
6
1952-
6
1980-1992
6
1994-
6
1998-
6
Middle English, 1100-1500
6
Ottoman Empire, 1288-1918
6
Revolution, 1789-1799
6
Since 1868
6
Since 1960
6
1066-1485
5
1783-1815
5
1789-1799
5
1848-1918
5
1865-1918
5
1865-1921
5
1865-1939
5
1867-1910
5
1910-1945
5
1914-1944
5
1918-1960
5
1919-1952
5
1922-
5
1938-1945
5
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