Era
1961-1970
162
1991-2000
156
1951-1960
105
1981-1990
95
2001-2010
80
1971-1980
77
20th century
37
1931-1940
35
1941-1950
32
1921-1930
31
18th century
26
17th century
15
19th century
15
1749-1832
13
1770-1827
13
16th century
12
-approximately 1540
11
1564-1616
11
1759-1805
11
1911-1920
10
2011-2020
10
15th century
9
Civil War, 1861-1865
9
Revolution, 1775-1783
8
1794-1827
7
500-1400
7
To 1961
7
1412-1431
6
1551 or 1552-1605
6
1788-1866
6
1969-1974
6
Early modern, 1500-1700
6
Middle English, 1100-1500
6
1220-1263
5
1631-1700
5
1762-1794
5
1809-1865
5
active 11th century
5
-1400
4
1367-1413
4
1685-1750
4
1797-1856
4
1799-1837
4
1811-1872
4
1819-1892
4
1844-1900
4
1862-1949
4
21st century
4
To 1931
4
-30 B.C.
3
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