Era
20th century
32
1900-1999
19
1945-
17
19th century
15
Since 1945
13
1800-1899
9
21st century
7
1900 - 1999
6
1914-1918
6
1990-
6
2000-2099
5
1777-1918
4
1933-1945
4
1991-
4
Since 1960
4
Since 1990
4
To 1775
4
1392-1910
3
1814-1905
3
18th century
3
1905-1950
3
1939-1945
3
1945-1990
3
1989-
3
1994-
3
Since 1989
3
Since 1991
3
Since 1994
3
To 146 B.C
3
1700-1799
2
1757-1836
2
1789-1900
2
1798 - 1942
2
1798-1942
2
1830-
2
1848-1849
2
1871-1888
2
1871-1918
2
1898-1948
2
1912-1949
2
1918 - 1938
2
1918-
2
1918-1933
2
1918-1938
2
1919-1952
2
1949-1976
2
1958-
2
1960-
2
1964-1979
2
1973-
2
more ...