Era
20th century
1,358
1900-1999
470
19th century
160
1929-1968
138
1877-1964
55
1800-1899
51
1951-
44
1868-1963
35
21st century
32
1925-1965
28
To 1964
28
1865-1950
27
1900 - 1999
26
1945-1989
26
1975-
23
1963-1969
19
1800-1999
18
2000-2099
18
1913-2005
17
1918-1961
17
Civil War, 1861-1865
17
Since 1900
17
1964-
16
1887-1940
14
1933-1945
14
1917-1963
13
1940-2020
13
1908-1973
12
1989-
12
1809-1865
11
1861-1865
11
18th century
11
1933-
11
1960-1980
11
1903-1986
10
1932-
10
1941-
10
1945-
10
1925-1963
9
1941-1955
9
1961-1963
9
1961-1969
9
1856-1915
8
1924-1987
8
1953-1961
8
1964-1975
8
1863-1877
7
1865-1918
7
1912-1987
7
1940 February 21-
7
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