Historical Period
20th century
25
21st century
14
1975-
7
19th century
6
Civil War, 1861-1865
6
To 1964
4
1942-
3
To 1865
3
1865-1918
2
1908-1960
2
1918-1932
2
1924-1987
2
1956-
2
1980-2020
2
1564-1616
1
1826-1882
1
1865-1951
1
1871-1938
1
1902-1967
1
1906-1987
1
1912-1987
1
1922-1945
1
1923-2012
1
1934-2014
1
1941-1955
1
1945-1990
1
1948-
1
1949-1998
1
1973-2020
1
1974-
1
1977-
1
1978-
1
1983-
1
1995-2012
1
Colonial period, ca. 1600-1775
1
approximately 1775-approximately 1815
1
d. 1998
1