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1-1/8% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due January 15, 2021

Ref CPI and Index Ratios for September 2012

    Contact: Office of Financing            202-504-3550
    DESCRIPTION:                            A-2021
    CUSIP NUMBER:                           912828PP9
    DATED DATE:                             January 15, 2011
    ORIGINAL ISSUE DATE:                    January 31, 2011
    ADDITIONAL ISSUE DATE:                  March 31, 2011
                                            May 31, 2011
    MATURITY DATE:                          January 15, 2021
    Ref CPI on DATED DATE:                  218.75255
    TABLE FOR MONTH OF:                     September 2012
    NUMBER OF DAYS IN MONTH:                30

    CPI-U (NSA) May 2012                    229.815
    CPI-U (NSA) June 2012                   229.478
    CPI-U (NSA) July 2012                   229.104

    Month   Calendar Day   Year    Ref CPI      Index Ratio

    September      1       2012    229.47800       1.04903
    September      2       2012    229.46553       1.04897
    September      3       2012    229.45307       1.04892
    September      4       2012    229.44060       1.04886
    September      5       2012    229.42813       1.04880
    September      6       2012    229.41567       1.04875
    September      7       2012    229.40320       1.04869
    September      8       2012    229.39073       1.04863
    September      9       2012    229.37827       1.04857
    September      10      2012    229.36580       1.04852
    September      11      2012    229.35333       1.04846
    September      12      2012    229.34087       1.04840
    September      13      2012    229.32840       1.04835
    September      14      2012    229.31593       1.04829
    September      15      2012    229.30347       1.04823
    September      16      2012    229.29100       1.04818
    September      17      2012    229.27853       1.04812
    September      18      2012    229.26607       1.04806
    September      19      2012    229.25360       1.04800
    September      20      2012    229.24113       1.04795
    September      21      2012    229.22867       1.04789
    September      22      2012    229.21620       1.04783
    September      23      2012    229.20373       1.04778
    September      24      2012    229.19127       1.04772
    September      25      2012    229.17880       1.04766
    September      26      2012    229.16633       1.04761
    September      27      2012    229.15387       1.04755
    September      28      2012    229.14140       1.04749
    September      29      2012    229.12893       1.04743
    September      30      2012    229.11647       1.04738