Era
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1908-1960
4
1909-1955
3
1909-2001
1
1910-1999
1
1912-1989
1
1914-1997
1
1918-1992
1
1919-2010
1
1920-1985
1
1922-1969
2
1922-1998
1
1924-1975
1
1925-2012
1
1926-1997
1
1930-
3
1933-
2
1933-2023
1
1934-2014
2
1938-1988
4
1945-
1
1945-2020
1
1950-
1
1953-
2
19th century
14
20th century
68
21st century
1
Civil War, 1861-1865
3