Era
1945-
10
1981-2001
10
2001-2009
9
1993-2001
7
21st century
7
20th century
6
Since 1945
6
Since 1981
5
1971-1981
4
1981-
4
2009-
4
1980-
3
1981-2009
3
1969-
2
1971-2001
2
1991-
2
19th century
2
2001-
2
(1992 October 7)
1
1877-1945
1
1880-1968
1
1906-
1
1913-1997
1
1917-1963
1
1918-1945
1
1927-1993
1
1939-1945
1
1953-
1
1960-1980
1
1971-
1
1977-1981
1
1981-1993
1
1988-
1
1990-
1
1993-2009
1
1994-
1
21 st century
1
Estados Unidos de América
1
Siglo 20
1
Since 1969
1
Since 1980
1
Since 1993
1