Era
20th century
2,456
19th century
1,065
1900-1999
923
1800-1899
321
21st century
278
18th century
164
Civil War, 1861-1865
151
2000-2099
134
1865-1950
119
1975-
112
1951-
108
1800-1999
92
1929-1968
77
1775-1865
68
1877-1964
67
1980-
62
1865-1877
61
Colonial period, ca. 1600-1775
59
To 1964
55
1945-
51
1945-1989
51
1900 - 1999
50
17th century
48
1861-1865
43
1941-1955
42
Since 1900
41
Since 1975
38
1865-1918
36
1868-1963
36
1989-
32
2009-2017
32
1863-1877
31
1933-1945
31
1900-2099
29
1994-
28
1700-1799
25
To 1863
25
1700-1899
24
1835-1910
24
1865-
23
1897-1962
23
1946-
23
2001-2009
23
2008
23
1800 - 1899
20
1809-1865
19
1818-1895
19
1960-1980
19
1600-1799
18
1924-1987
18
more ...