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2-3/8% 5-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due April 15, 2011

Ref CPI and Index Ratios for September 2007

    Contact: Office of Financing            202-504-3550
    DESCRIPTION:                            Series G-2011
    CUSIP NUMBER:                           912828FB1
    DATED DATE:                             April 15, 2006
    ORIGINAL ISSUE DATE:                    April 28, 2006
    ADDITIONAL ISSUE DATE:                  October 31, 2006
    MATURITY DATE:                          April 15, 2011
    Ref CPI on DATED DATE:                  198.48667
    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       1.04970
    September         2        2007    208.35023       1.04969
    September         3        2007    208.34847       1.04968
    September         4        2007    208.34670       1.04968
    September         5        2007    208.34493       1.04967
    September         6        2007    208.34317       1.04966
    September         7        2007    208.34140       1.04965
    September         8        2007    208.33963       1.04964
    September         9        2007    208.33787       1.04963
    September         10       2007    208.33610       1.04962
    September         11       2007    208.33433       1.04961
    September         12       2007    208.33257       1.04960
    September         13       2007    208.33080       1.04960
    September         14       2007    208.32903       1.04959
    September         15       2007    208.32727       1.04958
    September         16       2007    208.32550       1.04957
    September         17       2007    208.32373       1.04956
    September         18       2007    208.32197       1.04955
    September         19       2007    208.32020       1.04954
    September         20       2007    208.31843       1.04953
    September         21       2007    208.31667       1.04952
    September         22       2007    208.31490       1.04952
    September         23       2007    208.31313       1.04951
    September         24       2007    208.31137       1.04950
    September         25       2007    208.30960       1.04949
    September         26       2007    208.30783       1.04948
    September         27       2007    208.30607       1.04947
    September         28       2007    208.30430       1.04946
    September         29       2007    208.30253       1.04945
    September         30       2007    208.30077       1.04944