Era
20th century
740
19th century
344
21st century
317
1900-1999
309
2000-2099
157
18th century
145
To 1500
137
17th century
95
1945-
87
1800-1899
82
16th century
69
1989-
67
1945-1989
60
1800-1999
47
1991-
45
1864-1920
44
1926-1984
38
1980-
37
1700-1799
36
1818-1883
33
1960-
30
Since 1989
28
Since 1945
27
Since 1991
27
1918-1945
26
2000-
25
Colonial period, ca. 1600-1775
25
1900-2099
23
1933-1945
23
Since 1900
23
Since 2000
22
1564-1616
21
1889-1951
20
Civil War, 1861-1865
20
1900 - 1999
19
2002-
19
Since 2020
19
1865-1950
18
1949-
18
1951-
18
1775-1865
17
2001-2009
17
Since 1980
17
1858-1917
14
1946-
14
2009-2017
14
Revolution, 1775-1783
14
Since 1960
14
1644-1912
13
1723-1790
13
more ...