Era
1809-1865
7
19th century
6
1861-1865
5
20th century
5
1751-1836
3
1783-1809
3
1805-1859
3
1869-1948
3
18th century
3
1900-1999
3
1919-1947
3
Civil War, 1861-1865
3
1700-1809
2
1783-1865
2
1800-1899
2
1856-1915
2
1877-1949
2
1891-1956
2
1931-1939
2
1946-
2
1980-
2
2017-
2
21st century
2
Republic, 1931-1939
2
1735-1826
1
1743-1826
1
1767-1848
1
1795-1881
1
1806-1873
1
1815-1861
1
1815-1882
1
1818-1883
1
1819-1892
1
1820-1895
1
1826-1877
1
1837-1901
1
1849-1877
1
1865-1918
1
1869-1877
1
1875-1950
1
1878-1972
1
1884-1963
1
1901-1970
1
1947-
1
1950-1966
1
1989-
1
2001-
1
2001-2009
1
Since 1900
1
Since 1980
1
more ...