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

Ref CPI and Index Ratios for August 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:                     August 2007
    NUMBER OF DAYS IN MONTH:                31

    CPI-U (NSA) April 2007                  206.686
    CPI-U (NSA) May 2007                    207.949
    CPI-U (NSA) June 2007                   208.352

    Month   Calendar Day    Year    Ref CPI       Index Ratio

    August          1       2007    207.94900       1.04767
    August          2       2007    207.96200       1.04774
    August          3       2007    207.97500       1.04780
    August          4       2007    207.98800       1.04787
    August          5       2007    208.00100       1.04793
    August          6       2007    208.01400       1.04800
    August          7       2007    208.02700       1.04807
    August          8       2007    208.04000       1.04813
    August          9       2007    208.05300       1.04820
    August          10      2007    208.06600       1.04826
    August          11      2007    208.07900       1.04833
    August          12      2007    208.09200       1.04839
    August          13      2007    208.10500       1.04846
    August          14      2007    208.11800       1.04852
    August          15      2007    208.13100       1.04859
    August          16      2007    208.14400       1.04865
    August          17      2007    208.15700       1.04872
    August          18      2007    208.17000       1.04879
    August          19      2007    208.18300       1.04885
    August          20      2007    208.19600       1.04892
    August          21      2007    208.20900       1.04898
    August          22      2007    208.22200       1.04905
    August          23      2007    208.23500       1.04911
    August          24      2007    208.24800       1.04918
    August          25      2007    208.26100       1.04924
    August          26      2007    208.27400       1.04931
    August          27      2007    208.28700       1.04938
    August          28      2007    208.30000       1.04944
    August          29      2007    208.31300       1.04951
    August          30      2007    208.32600       1.04957
    August          31      2007    208.33900       1.04964