Era
21st century
277
20th century
197
2000-
117
19th century
58
1901-1981
27
1991-
24
1989-
23
1976-2000
22
1945-
20
18th century
17
1949-
13
1960-
11
2009-
11
1896-1934
9
1899-1992
9
1946-
9
1991-2016
9
Quaternary
9
To 1500
9
1723-1790
8
1856-1939
8
1990-
7
Archaean
7
Pleistocene
7
16th century
6
1809-1882
6
1883-1946
6
1889-1951
6
1918-1945
6
1947-
6
2002-
6
Cenozoic
6
17th century
5
1818-1883
5
1859-1952
5
1869-1948
5
1883-1950
5
2001-2009
5
Jurassic
5
Paleogene
5
Precambrian
5
To 500
5
1452-1519
4
1789-1846
4
1844-1900
4
1848-1923
4
1921-1997
4
1926-1984
4
1931-
4
1939-
4
more ...