1980s

October 1980
September 1983
April-May 1985
April-May 1986

1990s

1991

May-June
July-August
September
November

1995

April
May

1996

March
May
July-August

1997

January
May
July 
August

2000s

2000

February
April
May
August
September
October
December

2001

February
September
November

2002

April
May
July
December

2003

February
March
April
June
September
October

2004

February
July
Dear Reader, undated