2010 June 24, 2010

2009 September 30/October 1, 2009 June 24, 2009 May 20, 2009 (Conference Call) February 25-26, 2009

2008 December 11-12, 2008 September 17-18, 2008 May 21-22, 2008 February 27-28, 2008

2007 December 5-6, 2007 September 26-27, 2007 May 16-17, 2007 March 27-28, 2007

2006 December 6-7, 2006 September 20-21, 2006 May 17-18, 2006 February 22-23, 2006

2005 December 7-8, 2005 May 10, 2005 February 15-16, 2005 January 13, 2005

2004 December 1, 2004 October 6, 2004 (Conference Call) September 8, 2004 (Conference Call) August 6, 2004 (Conference Call) August 3, 2004 (Conference Call) May 4-5, 2004 February 18-19, 2004

2003 December 2-3, 2003 October 15, 2003 July 29-30, 2003 April 1-2, 2003 February 4, 2003

2002 October 16-17, 2002 August 23, 2002 (Conference Call) July 9, 2002 June 6-7, 2002 March 21, 2002 February 11, 2002 January 16, 2002

2000 November 13, 2000 July 19-20, 2000 June 19, 2000 May 24, 2000 May 12, 2000

1999 September 29-30, 1999 May 25, 1999 February 2-3, 1999

1998 June 24, 1998

1997 December 15, 1997 August 4-5, 1997