Era
20th century
450
19th century
274
21st century
207
1900-1999
145
18th century
143
1989-
108
1945-1989
88
2000-2099
82
1800-1899
67
1946-
67
1945-
54
Since 1900
54
1991-
49
17th century
41
To 1500
39
1775-1783
37
1783-1865
37
Civil War, 1861-1865
37
1933-1945
36
1980-
34
2017-
34
Revolution, 1775-1783
33
Since 1989
33
2001-2009
32
2009-2017
32
1951-
31
1990-
31
1861-1865
27
Since 1991
27
1865-1950
25
1775-1865
24
To 1775
24
1815-1861
21
To 1865
21
1952-
20
1700-1799
18
1936-1953
18
1783-1809
17
1800-1999
17
1960-1980
17
Revolution, 1789-1799
17
Since 2000
17
1809-1865
16
Since 1945
16
16th century
14
1945-1953
14
2016
14
2017-2021
14
Since 2017
14
1917-1936
13
more ...