April 23, 1983




September 24, 1985

January 15, 1987

September 1989

March 1, 1991




September 1995

August 16, 1997

August 31, 1997

September 6, 1997

March 24, 1998


June 2000

August 4, 2000

December 7, 2000

September 23, 2001


April 5, 2002

June 4, 2002

April 9, 2005


June 23, 2005

October 2005

February 10, 2007

July 1, 2007

April 11, 2008

June 18, 2009

January 18, 2010


June 15, 2010
November 16, 2010