Era
20th century
480
19th century
440
1945-
145
1951-
129
18th century
118
1900-1999
100
20e siècle
98
1800-1899
91
19e siècle
86
1783-1865
64
Colonial period, ca. 1600-1775
63
Civil War, 1861-1865
61
1947-
46
1971-
44
17th century
42
21st century
40
Revolution, 1775-1783
39
16th century
38
1774-1809
38
1835-1910
38
1770-1838
37
1949-
36
1952-
36
1970-
35
1960-
34
1917-
33
To 1848
33
1564-1616
28
1254-1323?
27
1865-1918
27
1918-1945
27
1709-1784
26
To 1775
26
1981-
24
1946-
23
1783-1848
20
1805-1859
20
1813-1873
20
1817-1860
20
1817-1862
20
1843-1916
19
1866-1895
19
18e siècle
19
1959-
19
Since 1945
19
1861-1865
18
1945-1991
18
1950-
18
1958-
18
1975-
18
more ...