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1-7/8% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due July 15, 2019

Ref CPI and Index Ratios for May 2011

    Contact: Office of Financing            202-504-3550
    DESCRIPTION:                            D-2019
    CUSIP NUMBER:                           912828LA6
    DATED DATE:                             July 15, 2009
    ORIGINAL ISSUE DATE:                    July 15, 2009
    ADDITIONAL ISSUE DATE:                  October 15, 2009
    MATURITY DATE:                          July 15, 2019
    Ref CPI on DATED DATE:                  213.51819
    TABLE FOR MONTH OF:                     May 2011
    NUMBER OF DAYS IN MONTH:                31

    CPI-U (NSA) January 2011                220.223
    CPI-U (NSA) February 2011               221.309
    CPI-U (NSA) March 2011                  223.467

    Month   Calendar Day   Year    Ref CPI      Index Ratio

    May            1       2011    221.30900       1.03649
    May            2       2011    221.37861       1.03681
    May            3       2011    221.44823       1.03714
    May            4       2011    221.51784       1.03747
    May            5       2011    221.58745       1.03779
    May            6       2011    221.65706       1.03812
    May            7       2011    221.72668       1.03844
    May            8       2011    221.79629       1.03877
    May            9       2011    221.86590       1.03910
    May            10      2011    221.93552       1.03942
    May            11      2011    222.00513       1.03975
    May            12      2011    222.07474       1.04007
    May            13      2011    222.14435       1.04040
    May            14      2011    222.21397       1.04073
    May            15      2011    222.28358       1.04105
    May            16      2011    222.35319       1.04138
    May            17      2011    222.42281       1.04170
    May            18      2011    222.49242       1.04203
    May            19      2011    222.56203       1.04236
    May            20      2011    222.63165       1.04268
    May            21      2011    222.70126       1.04301
    May            22      2011    222.77087       1.04333
    May            23      2011    222.84048       1.04366
    May            24      2011    222.91010       1.04399
    May            25      2011    222.97971       1.04431
    May            26      2011    223.04932       1.04464
    May            27      2011    223.11894       1.04496
    May            28      2011    223.18855       1.04529
    May            29      2011    223.25816       1.04562
    May            30      2011    223.32777       1.04594
    May            31      2011    223.39739       1.04627