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

Ref CPI and Index Ratios for February 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:                     February 2011
    NUMBER OF DAYS IN MONTH:                28

    CPI-U (NSA) October 2010                218.711
    CPI-U (NSA) November 2010               218.803
    CPI-U (NSA) December 2010               219.179

    Month   Calendar Day   Year    Ref CPI      Index Ratio

    February       1       2011    218.80300       1.12490
    February       2       2011    218.81643       1.12496
    February       3       2011    218.82986       1.12503
    February       4       2011    218.84329       1.12510
    February       5       2011    218.85671       1.12517
    February       6       2011    218.87014       1.12524
    February       7       2011    218.88357       1.12531
    February       8       2011    218.89700       1.12538
    February       9       2011    218.91043       1.12545
    February       10      2011    218.92386       1.12552
    February       11      2011    218.93729       1.12559
    February       12      2011    218.95071       1.12565
    February       13      2011    218.96414       1.12572
    February       14      2011    218.97757       1.12579
    February       15      2011    218.99100       1.12586
    February       16      2011    219.00443       1.12593
    February       17      2011    219.01786       1.12600
    February       18      2011    219.03129       1.12607
    February       19      2011    219.04471       1.12614
    February       20      2011    219.05814       1.12621
    February       21      2011    219.07157       1.12628
    February       22      2011    219.08500       1.12634
    February       23      2011    219.09843       1.12641
    February       24      2011    219.11186       1.12648
    February       25      2011    219.12529       1.12655
    February       26      2011    219.13871       1.12662
    February       27      2011    219.15214       1.12669
    February       28      2011    219.16557       1.12676