Era
20th century
420
21st century
213
19th century
117
1945-
77
1818-1883
58
Since 1945
53
18th century
51
Siglo XX
49
Siglo 20
47
1970-
40
1982-
36
1994-
32
S XX
31
16th century
24
17th century
24
1990-
21
1991-
21
Siglo XXI
21
Siglo 21
19
1988-
18
2008-
18
To 1500
17
1975-
16
2000-
16
1864-1920
15
1980-
15
1989-
15
Siglo 19
14
1983-
13
Since 1991
13
1927-1998
12
1939-1975
12
1973-
12
1974-
11
1960-
10
1973-1988
10
1981-2001
10
S XXI
10
Siglo XIX
10
Since 1989
10
1858-1917
9
1930-2002
9
1981-
9
2001-2009
9
Civil War, 1936-1939
9
Since 1970
9
1891-1937
8
1955-1983
8
1982-1994
8
1985-
8
more ...