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1-7/8% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due July 15, 2015

Ref CPI and Index Ratios for May 2012

    Contact: Office of Financing            202-504-3550
    DESCRIPTION:                            D-2015
    CUSIP NUMBER:                           912828EA4
    DATED DATE:                             July 15, 2005
    ORIGINAL ISSUE DATE:                    July 15, 2005
    ADDITIONAL ISSUE DATE:                  October 17, 2005
    MATURITY DATE:                          July 15, 2015
    Ref CPI on DATED DATE:                  194.50968
    TABLE FOR MONTH OF:                     May 2012
    NUMBER OF DAYS IN MONTH:                31

    CPI-U (NSA) January 2012                226.665
    CPI-U (NSA) February 2012               227.663
    CPI-U (NSA) March 2012                  229.392

    Month   Calendar Day   Year    Ref CPI      Index Ratio

    May            1       2012    227.66300       1.17045
    May            2       2012    227.71877       1.17073
    May            3       2012    227.77455       1.17102
    May            4       2012    227.83032       1.17131
    May            5       2012    227.88610       1.17159
    May            6       2012    227.94187       1.17188
    May            7       2012    227.99765       1.17217
    May            8       2012    228.05342       1.17245
    May            9       2012    228.10919       1.17274
    May            10      2012    228.16497       1.17303
    May            11      2012    228.22074       1.17331
    May            12      2012    228.27652       1.17360
    May            13      2012    228.33229       1.17389
    May            14      2012    228.38806       1.17417
    May            15      2012    228.44384       1.17446
    May            16      2012    228.49961       1.17475
    May            17      2012    228.55539       1.17503
    May            18      2012    228.61116       1.17532
    May            19      2012    228.66694       1.17561
    May            20      2012    228.72271       1.17589
    May            21      2012    228.77848       1.17618
    May            22      2012    228.83426       1.17647
    May            23      2012    228.89003       1.17675
    May            24      2012    228.94581       1.17704
    May            25      2012    229.00158       1.17733
    May            26      2012    229.05735       1.17761
    May            27      2012    229.11313       1.17790
    May            28      2012    229.16890       1.17819
    May            29      2012    229.22468       1.17847
    May            30      2012    229.28045       1.17876
    May            31      2012    229.33623       1.17905