Era
1744-1822
1
1775-1865
1
1789-1797
1
1800-1899
2
1807-1875
1
1808-1892
1
1809-1865
1
1813-1868
2
1824-1907
1
1832-1904
2
1845-1861
1
1847-1918
2
1861-1865
1
1861-1950
1
1865-1877
1
1865-1898
1
1865-1950
7
18th century
1
1902-2003
1
1907-1998
1
1933-1945
1
1945-1989
1
1951-
2
19th century
2
20th century
1
Civil War, 1861-1865
4
Since 1865
1
To 1933
1