2010
November 3
June 3

2009
June 4
November 5

2008
January 22
September 4
November 5

2007
June 7
September 6

2006
2005
2004
2003
(on hiatus)
 

2002
January 16
June 20
March 13
October 3

2001
January 16
June 21
October 4

2000
January 13
June 27
October 12

1999
March 25
September 14
December 1

1998
January 6
March 5
September 22

1997
February 25
April 25
June 2
September 10
November 19

1996
May 15
July 30
November 15

1995
November 15
June 20

1994
November 16
August 11
February 11

1993
November 17
August 13
April 15

1992
December 17
August 28
April 29
February 12

1991
November 13
August 21
May 2
February 28

1990
December 6
August 21
April 26
January 17
 

1989

1988
November 16
August 19
April 21
January 28

1987
November 24
August 28
June 3
January 30

1986
February 13
April 25
August 5
October 28

1985
January 21
April 25
July 10
November 7

1984
January 26
April 26
August 3
November 13

1983
January 26
April 27
July 26
October 25

1982

1981

1980