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

Ref CPI and Index Ratios for February 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:                     February 2007
    NUMBER OF DAYS IN MONTH:                28

    CPI-U (NSA) October 2006                201.8
    CPI-U (NSA) November 2006               201.5
    CPI-U (NSA) December 2006               201.8

    Month   Calendar Day    Year    Ref CPI       Index Ratio

    February        1       2007    201.50000       1.01518
    February        2       2007    201.51071       1.01524
    February        3       2007    201.52143       1.01529
    February        4       2007    201.53214       1.01534
    February        5       2007    201.54286       1.01540
    February        6       2007    201.55357       1.01545
    February        7       2007    201.56429       1.01551
    February        8       2007    201.57500       1.01556
    February        9       2007    201.58571       1.01561
    February        10      2007    201.59643       1.01567
    February        11      2007    201.60714       1.01572
    February        12      2007    201.61786       1.01578
    February        13      2007    201.62857       1.01583
    February        14      2007    201.63929       1.01588
    February        15      2007    201.65000       1.01594
    February        16      2007    201.66071       1.01599
    February        17      2007    201.67143       1.01605
    February        18      2007    201.68214       1.01610
    February        19      2007    201.69286       1.01615
    February        20      2007    201.70357       1.01621
    February        21      2007    201.71429       1.01626
    February        22      2007    201.72500       1.01632
    February        23      2007    201.73571       1.01637
    February        24      2007    201.74643       1.01642
    February        25      2007    201.75714       1.01648
    February        26      2007    201.76786       1.01653
    February        27      2007    201.77857       1.01658
    February        28      2007    201.78929       1.01664