Era
20th century
320
1981-1989
114
1963-1969
77
21st century
77
1900-1999
63
1946-
56
1961-1969
51
19th century
50
1969-1974
46
To 1863
38
1800-1859
31
2000-2099
30
1977-1981
29
1973-1993
26
1845-1861
25
2009-
24
1913-1994
23
2017-2021
21
1805-1879
19
1974-1977
17
1936-
16
1948-
16
1908-1973
15
1924-
15
1941-
14
1945-
14
1971-1981
14
1940-
13
1951-
13
18th century
12
1943-
12
1953-
12
1966-
12
1969-
12
1989-
12
1913-2006
11
1938-
11
1944-
11
1980-
11
Civil War, 1975-1990
11
1818-1895
10
1930-
10
1952-
10
1956-
10
1965-
10
2001-2009
10
2020
10
Colonial period, ca. 1600-1775
10
1925-
9
1926-
9
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