Era
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1966-1998
1
1968-1989
1
1968-1998
1
1969-
1
1970-1973
1
1970-1982
1
1973-1985
1
1974-1999
1
1975-1982
1
1975-1990
1
1976-1994
1
1976-2002
1
1977-
1
1979-1983
1
1980-1984
1
1981-2011
1
1983-2002
1
1984-
1
1984-1993
1
1985-2002
1
1990
1
1991-2003-
1
1992-
1
1993-2007
1
1995-2007
1
1998-
1
1999-
1
2001-
1
2003-
1
2007-2012
1
Since 1948
1
Since 1959
1
Since 1963
1
Since 1964
1
Since 1965
1
Since 1966
1
Since 1969
1
Since 1973
1
Since 1980
1
Since 1992
1
Since 1994
1
Since 1997
1
Since 2001
1
Since 2002
1