Era
20th century
62
1900-1999
45
19th century
22
21st century
16
1800-1899
15
1910-1946
15
2000-2099
13
Since 1900
9
18th century
7
1931-1939
6
1810-
5
1939-1975
4
1955-1983
4
1980-
4
Republic, 1931-1939
4
Revolution, 1910-1920
4
Revolution, 1959
4
1540-1810
3
16th century
3
1821-1861
3
1900 - 1999
3
1946-1970
3
1959-1990
3
1970-1973
3
1970-1988
3
1974-
3
1990-
3
Civil War, 1936-1939
3
Since 1810
3
To 1810
3
1500-1599
2
1700-1799
2
1735-1826
2
1744-1818
2
1775-1783
2
1775-1809
2
1783-1809
2
1792-1840
2
1819-1831
2
1822-1832
2
1877-1949
2
1890-1978
2
1895-1970
2
1910-1920
2
1920-1970
2
1926-1945
2
1926-1989
2
1926-2016
2
1945-
2
1946-1974
2
more ...