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

Ref CPI and Index Ratios for May 2008

    Contact: Office of Financing            202-504-3550
    DESCRIPTION:                            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:                     May 2008
    NUMBER OF DAYS IN MONTH:                31

    CPI-U (NSA) January 2008                211.080
    CPI-U (NSA) February 2008               211.693
    CPI-U (NSA) March 2008                  213.528

    Month   Calendar Day   Year    Ref CPI      Index Ratio

    May            1       2008    211.69300       1.21631
    May            2       2008    211.75219       1.21665
    May            3       2008    211.81139       1.21699
    May            4       2008    211.87058       1.21733
    May            5       2008    211.92977       1.21767
    May            6       2008    211.98897       1.21801
    May            7       2008    212.04816       1.21835
    May            8       2008    212.10735       1.21869
    May            9       2008    212.16655       1.21903
    May            10      2008    212.22574       1.21937
    May            11      2008    212.28494       1.21971
    May            12      2008    212.34413       1.22005
    May            13      2008    212.40332       1.22039
    May            14      2008    212.46252       1.22073
    May            15      2008    212.52171       1.22107
    May            16      2008    212.58090       1.22141
    May            17      2008    212.64010       1.22175
    May            18      2008    212.69929       1.22209
    May            19      2008    212.75848       1.22243
    May            20      2008    212.81768       1.22277
    May            21      2008    212.87687       1.22311
    May            22      2008    212.93606       1.22345
    May            23      2008    212.99526       1.22379
    May            24      2008    213.05445       1.22413
    May            25      2008    213.11365       1.22447
    May            26      2008    213.17284       1.22481
    May            27      2008    213.23203       1.22515
    May            28      2008    213.29123       1.22549
    May            29      2008    213.35042       1.22583
    May            30      2008    213.40961       1.22617
    May            31      2008    213.46881       1.22651