Era
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1994-
111
1818-1883
108
1993-
108
1700-1799
100
Since 1990
99
1971-
98
2008-2009
97
1970-
95
Civil War, 1861-1865
94
1945-1964
93
1900-2099
91
1988-
91
1883-1946
89
1976-2002
89
Since 1976
85
1971-1990
81
Since 2009
75
1723-1790
72
1917-1945
72
Since 1980
72
1948-
70
1946-
69
1961-
68
1985-1991
67
1949-1976
65
2003-
62
To 1933
61
1975-1985
60
1952-
58
Colonial period, ca. 1600-1775
55
Medieval, 500-1500
54
1066-1485
53
1700-1899
53
1960-1980
53
1945-1960
52
1959-1990
51
1976-
51
1986-1991
51
2009-2017
51
1979-1997
50
Since 1997
50
1986-
49
1775-1865
48
1985-
48
1644-1912
46
1912-1949
46
1951-
46
1981-1989
46
Since 1949
45
Since 1979
45
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