January 1998                  January 1999                 January 2000                 January 2001                  January 2002                 January 2003

February 1998                February 1999               February 2000                February 2001                 February 2002                February 2003 

March 1998                    March 1999                   March 2000                   March 2001                     March 2002                     December 2003

April 1998                      April 1999                      April 2000                     April 2001                       April 2002                        January 2004

May 1998                      May 1999                      May 2000                      May 2001                        May 2002                         February 2004

June 1998                     June 1999                     June 2000                     June 2001                      June 2002                         March 2004

July 1998                      July 1999                      July 2000                      July 2001                        July 2002                           April 2004

August 1998                  August 1999                 August 2000                  August 2001                    August 2002                      October 2008

September 1998           September 1999           September 2000           September 2001             September 2002

October 1998                October 1999                October 2000                October 2001                  October 2002

November 1998            November 1999             November 2000            November 2001              November 2002

December 1998            December 1999             December 2000            December 2001              December 2002