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3-1/2% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due January 15, 2011

Ref CPI and Index Ratios for September 2007

    Contact: Office of Financing            202-504-3550
    DESCRIPTION:                            Series A-2011
    CUSIP NUMBER:                           9128276R8
    DATED DATE:                             January 15, 2001
    ORIGINAL ISSUE DATE:                    January 16, 2001
    ADDITIONAL ISSUE DATE:                  July 16, 2001
    MATURITY DATE:                          January 15, 2011
    Ref CPI on DATED DATE:                  174.04516
    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       1.19711
    September       2       2007    208.35023       1.19710
    September       3       2007    208.34847       1.19709
    September       4       2007    208.34670       1.19708
    September       5       2007    208.34493       1.19707
    September       6       2007    208.34317       1.19706
    September       7       2007    208.34140       1.19705
    September       8       2007    208.33963       1.19704
    September       9       2007    208.33787       1.19703
    September       10      2007    208.33610       1.19702
    September       11      2007    208.33433       1.19701
    September       12      2007    208.33257       1.19700
    September       13      2007    208.33080       1.19699
    September       14      2007    208.32903       1.19698
    September       15      2007    208.32727       1.19697
    September       16      2007    208.32550       1.19696
    September       17      2007    208.32373       1.19695
    September       18      2007    208.32197       1.19694
    September       19      2007    208.32020       1.19693
    September       20      2007    208.31843       1.19692
    September       21      2007    208.31667       1.19691
    September       22      2007    208.31490       1.19690
    September       23      2007    208.31313       1.19689
    September       24      2007    208.31137       1.19688
    September       25      2007    208.30960       1.19687
    September       26      2007    208.30783       1.19686
    September       27      2007    208.30607       1.19685
    September       28      2007    208.30430       1.19684
    September       29      2007    208.30253       1.19683
    September       30      2007    208.30077       1.19682