Era
20th century
28
21st century
18
20th century --
8
1945-
6
19th century
5
1971-
4
1971
3
2002-
3
21st century --
3
18th century
2
1976-2002
2
19th century --
2
2000-
2
21 century
2
221 B.C.-960 A.D.
2
1522-1548
1
1533 - 1917
1
1600-1868
1
16th century
1
1780-1820
1
17th century
1
1800-1950
1
1837-1885
1
1848-1870
1
1865
1
1903-1966
1
1918 - 1945
1
1918-1932
1
1919-1933
1
1939-1945
1
1944-
1
1945
1
1945 - 1970
1
1948-1960
1
1951
1
1951-
1
1952-
1
1953-1985
1
1963-
1
1970-
1
1973-
1
1975
1
1977-
1
1979-1997
1
1980-
1
1993-2001
1
2002
1
20th Century
1
20th cenruty
1
20th century-
1
more ...