Era
20th century
135
21st century
104
Siglo 20
48
Siglo XX
42
2000-
39
19th century
27
1988-2000
24
Siglo 21
23
Siglo XXI
20
1980-
17
1955-1983
16
Siglo XIX
16
1910-1946
14
1974-
12
S XX
11
SIGLO 20
10
1810
9
1970-1988
9
18th century
8
1939-1975
8
1970-1973
8
1980
8
2006-2010
8
S XXI
8
1999-
7
1908-1973
6
1931-1939
6
1946-1970
6
1975-
6
1821-1861
5
1943-1955
5
1973-1988
5
1975-1982
5
1983-2002
5
1994-
5
2000
5
Civil War, 1936-1939
5
Siglo XVIII
5
16th century
4
17th century
4
1817-1860
4
1867-1910
4
1886-1931
4
1920-1970
4
1952-
4
1960-
4
1973
4
1982-
4
1988-
4
1990-
4
more ...