2007 April 19-20, 2007

2006 October 19-20, 2006 July 20-21, 2006 April 20-21, 2006 January 19-20, 2006

2005 November 15-16, 2005 August 30, 2005 April 19-20, 2005 January 26, 2005

2004 October 28-29, 2004 July 22-23, 2004 May 5, 2004 March 29-30, 2004 February 19, 2004 January 6-7, 2004

2003 December 3, 2003 October 15, 2003 September 18-19, 2003 June 3-4, 2003 May 8-9, 2003 March 28, 2003 (Conference Call) March 4-5, 2003 January 9, 2003

2002 November 5-6, 2002 September 9-10, 2002 August 12, 2002 July 15, 2002 May 1, 2002 March 4-5, 2002 January 14-15, 2002

2001 December 4-5, 2001 November 1-2, 2001 September 24-25, 2001 July 24-25, 2001 May 23-24, 2001 March 26-27, 2001 February 6, 2001

2000 December 7-8, 2000 October 31-November 1, 2000 September 21-22, 2000