Era
1960-
Since 1960
21
1923-2007
5
1949-
5
1982-
5
1997-
5
Civil War, 1945-1949
5
1944-
4
Since 1945
3
To 1960
3
-1996
2
1959-
2
1959-1996
2
1960-1982
2
1960-1997
2
1990-2000
2
20th century
2
1890-1970
1
1933-
1
1946-
1
1978-
1
1990-
1
1991-2000
1
21st century
1
Since 1900
1
To 2147483647
1
active 14th century
1