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4-1/4% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due January 15, 2010

Ref CPI and Index Ratios for December 2007

     Contact: Office of Financing            202-504-3550
     DESCRIPTION:                            Series A-2010
     CUSIP NUMBER:                           9128275W8
     DATED DATE:                             January 15, 2000
     ORIGINAL ISSUE DATE:                    January 18, 2000
     ADDITIONAL ISSUE DATE:                  July 17, 2000
     MATURITY DATE:                          January 15, 2010
     Ref CPI on DATED DATE:                  168.24516
     TABLE FOR MONTH OF:                     December 2007
     NUMBER OF DAYS IN MONTH:                31

     CPI-U (NSA) August 2007                 207.917
     CPI-U (NSA) September 2007              208.490
     CPI-U (NSA) October 2007                208.936

     Month      Calendar Day    Year    Ref CPI       Index Ratio

     December        1          2007    208.49000       1.23920
     December        2          2007    208.50439       1.23929
     December        3          2007    208.51877       1.23937
     December        4          2007    208.53316       1.23946
     December        5          2007    208.54755       1.23955
     December        6          2007    208.56194       1.23963
     December        7          2007    208.57632       1.23972
     December        8          2007    208.59071       1.23980
     December        9          2007    208.60510       1.23989
     December        10         2007    208.61948       1.23997
     December        11         2007    208.63387       1.24006
     December        12         2007    208.64826       1.24014
     December        13         2007    208.66265       1.24023
     December        14         2007    208.67703       1.24032
     December        15         2007    208.69142       1.24040
     December        16         2007    208.70581       1.24049
     December        17         2007    208.72019       1.24057
     December        18         2007    208.73458       1.24066
     December        19         2007    208.74897       1.24074
     December        20         2007    208.76335       1.24083
     December        21         2007    208.77774       1.24091
     December        22         2007    208.79213       1.24100
     December        23         2007    208.80652       1.24108
     December        24         2007    208.82090       1.24117
     December        25         2007    208.83529       1.24126
     December        26         2007    208.84968       1.24134
     December        27         2007    208.86406       1.24143
     December        28         2007    208.87845       1.24151
     December        29         2007    208.89284       1.24160
     December        30         2007    208.90723       1.24168
     December        31         2007    208.92161       1.24177