Era
1945-
6
1980-
4
20th century
3
Since 1945
3
Since 1980
3
1945-1995
2
1947-
2
Since 1947
2
1879-1922
1
1943-
1
1945-1983
1
1945-1989
1
1949-
1
1958-
1
1960-
1
1960-1980
1
1971-
1
1971-1991
1
1975-
1
1980-1984
1
1983-
1
1986-
1
1991-
1
1993-
1
1995-
1
Since 1949
1
Since 1960
1
Since 1965
1
Since 1975
1
Since 1986
1
Since 1991
1
Since 1993
1
approximately 1505-approximately 1530
1