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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 2008

    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 2008
    NUMBER OF DAYS IN MONTH:                31

    CPI-U (NSA) August 2008                 219.086
    CPI-U (NSA) September 2008              218.783
    CPI-U (NSA) October 2008                216.573

    Month   Calendar Day   Year    Ref CPI      Index Ratio

    December       1       2008    218.78300       1.12479
    December       2       2008    218.71171       1.12443
    December       3       2008    218.64042       1.12406
    December       4       2008    218.56913       1.12369
    December       5       2008    218.49784       1.12333
    December       6       2008    218.42655       1.12296
    December       7       2008    218.35526       1.12259
    December       8       2008    218.28397       1.12223
    December       9       2008    218.21268       1.12186
    December       10      2008    218.14139       1.12149
    December       11      2008    218.07010       1.12113
    December       12      2008    217.99881       1.12076
    December       13      2008    217.92752       1.12039
    December       14      2008    217.85623       1.12003
    December       15      2008    217.78494       1.11966
    December       16      2008    217.71365       1.11929
    December       17      2008    217.64235       1.11893
    December       18      2008    217.57106       1.11856
    December       19      2008    217.49977       1.11820
    December       20      2008    217.42848       1.11783
    December       21      2008    217.35719       1.11746
    December       22      2008    217.28590       1.11710
    December       23      2008    217.21461       1.11673
    December       24      2008    217.14332       1.11636
    December       25      2008    217.07203       1.11600
    December       26      2008    217.00074       1.11563
    December       27      2008    216.92945       1.11526
    December       28      2008    216.85816       1.11490
    December       29      2008    216.78687       1.11453
    December       30      2008    216.71558       1.11416
    December       31      2008    216.64429       1.11380