Era
1588-1649
1
1743-1826
1
1775-1865
1
1783-1865
1
1800-1899
4
1849-1861
1
1865-1918
3
18th century
1
1900-1999
2
1918-1945
1
1945-
2
1970-
3
1989-
1
19th century
8
2000-2099
2
20th century
5
21st century
2
Civil War, 1861-1865
1
George III, 1760-1820
1
Revolution, 1775-1783
3
Since 1970
2
Since 1989
1
To 1783
2