Era
1945-
10
Since 1945
8
Since 1981
4
1981-2001
3
1981-
2
1982-1994
2
1988-2002
2
1991-
2
1994-
2
2001-2009
2
Since 1976
2
1918-
1
1945-1989
1
1946-
1
1949-
1
1959-
1
1960-
1
1960-1988
1
1960-2002
1
1968-
1
1968-1989
1
1968-1998
1
1970-
1
1971-
1
1973-
1
1974-
1
1974-2009
1
1976-
1
1976-1994
1
1976-2000
1
1986-
1
1989-
1
1990-
1
1993-2001
1
2000-
1
2000-2099
1
2009-
1
21st century
1
Since 1946
1
Since 1949
1
Since 1959
1
Since 1960
1
Since 1970
1
Since 1971
1
Since 1974
1
Since 1982
1
Since 1986
1