Era
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1945-1960
10
Colonial period, ca. 1600-1775
10
Revolution, 1775-1783
10
Since 2008
10
1970-
9
1971-1990
9
Civil War, 1861-1865
9
1929-1933
8
1969-1974
8
1865-1921
7
2017-
7
1800-1999
6
1874-1964
6
1974-1977
6
1977-1981
6
2000-
6
2021-
6
Since 1865
6
1777-1852
5
1835-1919
5
1838-1916
5
1975-
5
1990-
5
2017-2021
5
2020
5
2020-
5
Since 1918
5
Since 2001
5
1763-1848
4
1775-1783
4
17th century
4
1800-1918
4
1809-1865
4
1893
4
1923-1929
4
1924-
4
1953-
4
1960-
4
1963-1969
4
1969-
4
1991-
4
Since 1993
4
To 1775
4
1706-1790
3
1783-1809
3
1789-1809
3
1836-1837
3
1861-1865
3
1865-1933
3
1913-2006
3
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