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3-7/8% 30-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due April 15, 2029

Ref CPI and Index Ratios for December 2007

   Contact: Office of Financing            202-504-3550
   DESCRIPTION:                            TIPS of April 2029
   CUSIP NUMBER:                           912810FH6
   DATED DATE:                             April 15, 1999
   ORIGINAL ISSUE DATE:                    April 15, 1999
   ADDITIONAL ISSUE DATE:                  October 15, 1999
                                           October 16, 2000
   MATURITY DATE:                          April 15, 2029
   Ref CPI on DATED DATE:                  164.39333
   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       1.26824
   December        2          2007    208.50439       1.26833
   December        3          2007    208.51877       1.26841
   December        4          2007    208.53316       1.26850
   December        5          2007    208.54755       1.26859
   December        6          2007    208.56194       1.26868
   December        7          2007    208.57632       1.26876
   December        8          2007    208.59071       1.26885
   December        9          2007    208.60510       1.26894
   December        10         2007    208.61948       1.26903
   December        11         2007    208.63387       1.26911
   December        12         2007    208.64826       1.26920
   December        13         2007    208.66265       1.26929
   December        14         2007    208.67703       1.26938
   December        15         2007    208.69142       1.26946
   December        16         2007    208.70581       1.26955
   December        17         2007    208.72019       1.26964
   December        18         2007    208.73458       1.26973
   December        19         2007    208.74897       1.26981
   December        20         2007    208.76335       1.26990
   December        21         2007    208.77774       1.26999
   December        22         2007    208.79213       1.27008
   December        23         2007    208.80652       1.27016
   December        24         2007    208.82090       1.27025
   December        25         2007    208.83529       1.27034
   December        26         2007    208.84968       1.27043
   December        27         2007    208.86406       1.27051
   December        28         2007    208.87845       1.27060
   December        29         2007    208.89284       1.27069
   December        30         2007    208.90723       1.27078
   December        31         2007    208.92161       1.27086