Era
1918-
1
1945-
1945-1964
1
1945-1981
1
1945-1984
1
1965-
1
1966-1997
1
1966-1998
1
1971-
1
1971-1981
1
1971-1991
1
1972-
1
1973-
1
1979-1997
1
1980-
1
1981-
2
1981-1995
1
1983-
1
1983-2002
1
1984-
1
1989-
1
1995-2007
1
1997-
1
1998-
1
2002-
1
2007-2012
1
Since 1945
47
Since 1966
1
Since 1972
1
Since 1981
1
Since 1983
1