Era
20th century
173
1900-1999
60
1945-1989
45
1989-
37
21st century
27
19th century
23
2001-2009
19
1933-1945
13
18th century
11
Since 1900
10
1981-1989
9
1783-1865
8
1945-1953
8
1800-1899
7
1945-
7
2000-2099
7
2009-2017
6
1775-1783
5
1865-1933
5
1900-2099
5
1951-
5
1953-1961
5
1961-1963
5
1963-1969
5
1700-1799
4
1900 - 1999
4
1917-2007
4
1933-1953
4
1946-
4
1960-1980
4
1980-
4
2017-
4
Revolution, 1775-1783
4
1632-1704
3
1740-1806
3
1806-1848
3
1884-1972
3
1895-1972
3
1902-1998
3
1908-1973
3
1921-2002
3
1961-1969
3
1993-
3
To 1933
3
1743-1826
2
1789-1815
2
1800-1999
2
1865-1950
2
1869-1930
2
1878-1963
2
more ...