EXHIBIT B

  PRESIDENT AND FELLOWS OF HARVARD COLLEGE'S PURCHASES ON THE NYSE FOR THE PAST
                                   SIXTY DAYS

           Date                  Shares Purchased            Price Per Share
           -----------------------------------------------------------------

           10/21/03                   4,000                  16.9
           10/22/03                   6,500                  16.7378
           10/24/03                   10,600                 16.1711
           11/04/03                   66,100                 17.2721
           11/04/03                   55,000                 17.3
           11/04/03                   15,400                 17.255
           11/05/03                   33,000                 17.32
           11/05/03                   17,700                 17.3095
           11/07/03                   33,000                 17.36
           11/10/03                   4,100                  17.3
           11/11/03                   22,000                 16.8882
           11/11/03                   48,100                 16.9042
           11/11/03                   9,000                  16.94
           11/12/03                   39,200                 17.4622
           11/13/03                   5,400                  17.63
           11/14/03                   13,100                 17.645
           11/14/03                   32,200                 17.5983
           11/17/03                   59,400                 17.0852
           11/18/03                   26,100                 17.2039
           11/19/03                   30,100                 16.75
           11/20/03                   11,700                 16.5161
           12/10/03                   40,500                 16.9185
           12/10/03                   35,900                 16.8911





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