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

Ref CPI and Index Ratios for December 2011

    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:                     December 2011
    NUMBER OF DAYS IN MONTH:                31

    CPI-U (NSA) August 2011                 226.545
    CPI-U (NSA) September 2011              226.889
    CPI-U (NSA) October 2011                226.421

    Month   Calendar Day   Year    Ref CPI      Index Ratio

    December       1       2011    226.88900       1.16647
    December       2       2011    226.87390       1.16639
    December       3       2011    226.85881       1.16631
    December       4       2011    226.84371       1.16623
    December       5       2011    226.82861       1.16616
    December       6       2011    226.81352       1.16608
    December       7       2011    226.79842       1.16600
    December       8       2011    226.78332       1.16592
    December       9       2011    226.76823       1.16585
    December       10      2011    226.75313       1.16577
    December       11      2011    226.73803       1.16569
    December       12      2011    226.72294       1.16561
    December       13      2011    226.70784       1.16554
    December       14      2011    226.69274       1.16546
    December       15      2011    226.67765       1.16538
    December       16      2011    226.66255       1.16530
    December       17      2011    226.64745       1.16522
    December       18      2011    226.63235       1.16515
    December       19      2011    226.61726       1.16507
    December       20      2011    226.60216       1.16499
    December       21      2011    226.58706       1.16491
    December       22      2011    226.57197       1.16484
    December       23      2011    226.55687       1.16476
    December       24      2011    226.54177       1.16468
    December       25      2011    226.52668       1.16460
    December       26      2011    226.51158       1.16453
    December       27      2011    226.49648       1.16445
    December       28      2011    226.48139       1.16437
    December       29      2011    226.46629       1.16429
    December       30      2011    226.45119       1.16422
    December       31      2011    226.43610       1.16414