
February 1, 1978

August 30, 1979

September 29, 1980

March 1, 1981

September 8, 1981

May 1, 1982

June 10, 1982

August 1, 1982

April 29, 1983

November 1, 1983

November 14, 1983

November 8, 1984

November 19, 1984

September 15, 1986

February 2, 1987

May 1, 1987

November 10, 1987

October 20, 1989

August 1, 1991

October 1, 1991

May 1, 1992

November 1, 1992

September 15, 1994

June 1, 1995

March 28, 1996

April 25, 1996

May 30, 1996

June 27, 1996

July 25, 1996

August 29, 1996

September 24, 1996

September 24, 1996

November 4, 1997

September 22, 1998

April 6, 1999

February 20, 2001

September 15, 2001

September 24, 2002

June 8, 2004

September 21, 2004

October 4, 2005

January 24, 2006

October 24, 2006

June 12, 2007

January 22, 2008

November 10, 2009

November 8, 2011

February 21, 2012

June 4, 2013

November 11, 2014

September 26, 2017

May 22, 2018

April 21, 2020

March 2, 2021