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0-7/8% 5-1/2-YEAR TREASURY INFLATION-PROTECTED SECURITIES Due April 15, 2010

Ref CPI and Index Ratios for September 2007

    Contact: Office of Financing            202-504-3550
    DESCRIPTION:                            Series D-2010
    CUSIP NUMBER:                           912828CZ1
    DATED DATE:                             October 15, 2004
    ORIGINAL ISSUE DATE:                    October 29, 2004
    ADDITIONAL ISSUE DATE:                  April 29, 2005
                                            October 28, 2005
    MATURITY DATE:                          April 15, 2010
    Ref CPI on DATED DATE:                  189.44516
    TABLE FOR MONTH OF:                     September 2007
    NUMBER OF DAYS IN MONTH:                30

    CPI-U (NSA) May 2007                    207.949
    CPI-U (NSA) June 2007                   208.352
    CPI-U (NSA) July 2007                   208.299

    Month      Calendar Day    Year    Ref CPI       Index Ratio

    September         1        2007    208.35200       1.09980
    September         2        2007    208.35023       1.09979
    September         3        2007    208.34847       1.09978
    September         4        2007    208.34670       1.09977
    September         5        2007    208.34493       1.09976
    September         6        2007    208.34317       1.09975
    September         7        2007    208.34140       1.09975
    September         8        2007    208.33963       1.09974
    September         9        2007    208.33787       1.09973
    September         10       2007    208.33610       1.09972
    September         11       2007    208.33433       1.09971
    September         12       2007    208.33257       1.09970
    September         13       2007    208.33080       1.09969
    September         14       2007    208.32903       1.09968
    September         15       2007    208.32727       1.09967
    September         16       2007    208.32550       1.09966
    September         17       2007    208.32373       1.09965
    September         18       2007    208.32197       1.09964
    September         19       2007    208.32020       1.09963
    September         20       2007    208.31843       1.09962
    September         21       2007    208.31667       1.09961
    September         22       2007    208.31490       1.09961
    September         23       2007    208.31313       1.09960
    September         24       2007    208.31137       1.09959
    September         25       2007    208.30960       1.09958
    September         26       2007    208.30783       1.09957
    September         27       2007    208.30607       1.09956
    September         28       2007    208.30430       1.09955
    September         29       2007    208.30253       1.09954
    September         30       2007    208.30077       1.09953