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

Ref CPI and Index Ratios for December 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:                     December 2012
    NUMBER OF DAYS IN MONTH:                31

    CPI-U (NSA) August 2012                 230.379
    CPI-U (NSA) September 2012              231.407
    CPI-U (NSA) October 2012                231.317

    Month   Calendar Day   Year    Ref CPI      Index Ratio

    December       1       2012    231.40700       1.05785
    December       2       2012    231.40410       1.05783
    December       3       2012    231.40119       1.05782
    December       4       2012    231.39829       1.05781
    December       5       2012    231.39539       1.05780
    December       6       2012    231.39248       1.05778
    December       7       2012    231.38958       1.05777
    December       8       2012    231.38668       1.05776
    December       9       2012    231.38377       1.05774
    December       10      2012    231.38087       1.05773
    December       11      2012    231.37797       1.05772
    December       12      2012    231.37506       1.05770
    December       13      2012    231.37216       1.05769
    December       14      2012    231.36926       1.05768
    December       15      2012    231.36635       1.05766
    December       16      2012    231.36345       1.05765
    December       17      2012    231.36055       1.05764
    December       18      2012    231.35765       1.05762
    December       19      2012    231.35474       1.05761
    December       20      2012    231.35184       1.05760
    December       21      2012    231.34894       1.05758
    December       22      2012    231.34603       1.05757
    December       23      2012    231.34313       1.05756
    December       24      2012    231.34023       1.05754
    December       25      2012    231.33732       1.05753
    December       26      2012    231.33442       1.05752
    December       27      2012    231.33152       1.05750
    December       28      2012    231.32861       1.05749
    December       29      2012    231.32571       1.05748
    December       30      2012    231.32281       1.05746
    December       31      2012    231.31990       1.05745