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2-1/8% 30-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due February 15, 2041

Ref CPI and Index Ratios for September 2011

    Contact: Office of Financing            202-504-3550
    DESCRIPTION:                            TIPS of February 2041
    CUSIP NUMBER:                           912810QP6
    DATED DATE:                             February 15, 2011
    ORIGINAL ISSUE DATE:                    February 28, 2011
    ADDITIONAL ISSUE DATE:                  June 30, 2011
    MATURITY DATE:                          February 15, 2041
    Ref CPI on DATED DATE:                  218.99100
    TABLE FOR MONTH OF:                     September 2011
    NUMBER OF DAYS IN MONTH:                30

    CPI-U (NSA) May 2011                    225.964
    CPI-U (NSA) June 2011                   225.722
    CPI-U (NSA) July 2011                   225.922

    Month   Calendar Day   Year    Ref CPI      Index Ratio

    September      1       2011    225.72200       1.03074
    September      2       2011    225.72867       1.03077
    September      3       2011    225.73533       1.03080
    September      4       2011    225.74200       1.03083
    September      5       2011    225.74867       1.03086
    September      6       2011    225.75533       1.03089
    September      7       2011    225.76200       1.03092
    September      8       2011    225.76867       1.03095
    September      9       2011    225.77533       1.03098
    September      10      2011    225.78200       1.03101
    September      11      2011    225.78867       1.03104
    September      12      2011    225.79533       1.03107
    September      13      2011    225.80200       1.03110
    September      14      2011    225.80867       1.03113
    September      15      2011    225.81533       1.03116
    September      16      2011    225.82200       1.03119
    September      17      2011    225.82867       1.03122
    September      18      2011    225.83533       1.03125
    September      19      2011    225.84200       1.03128
    September      20      2011    225.84867       1.03131
    September      21      2011    225.85533       1.03135
    September      22      2011    225.86200       1.03138
    September      23      2011    225.86867       1.03141
    September      24      2011    225.87533       1.03144
    September      25      2011    225.88200       1.03147
    September      26      2011    225.88867       1.03150
    September      27      2011    225.89533       1.03153
    September      28      2011    225.90200       1.03156
    September      29      2011    225.90867       1.03159
    September      30      2011    225.91533       1.03162