Era
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1926-
1
1927-1989
4
1927-2015
1
1928-2013
1
1929
2
1929-2010
1
1931-
2
1931-2015
2
1932-
2
1932-2003
3
1933-
2
1933-1982
1
1933-1991
1
1935-2012
3
1936-
1
1937-1969
1
1937-2015
1
1938-
1
1940-2003
2
1942-
2
1942-2008
1
1943-
2
1945-1989
2
1946-
2
1947-
4
1948-
4
1953-
2
1956-
1
1958-
1
1960-
1
1968-
1
1980-
1
19th century
113
2000-2099
2
20e siècle
3
20th century
512
21st century
8
Civil War, 1861-1865
2
Revolution, 1775-1783
1
Since 1865
1