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2-3/8% 20-1/2-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for October 2005

Contact: Office of Financing       202-504-3550
DESCRIPTION:                            TIPS of January 2025
CUSIP NUMBER:                           912810FR4
DATED DATE:                             July 15, 2004
ORIGINAL ISSUE DATE:                    July 30, 2004
ADDITIONAL ISSUE DATE:                  January 31, 2005
July 29, 2005
MATURITY DATE:                          January 15, 2025
Ref CPI on DATED DATE:                  188.49677
TABLE FOR MONTH OF:                     October 2005
NUMBER OF DAYS IN MONTH:                31

CPI-U (NSA) June 2005                   194.5
CPI-U (NSA) July 2005                   195.4
CPI-U (NSA) August 2005                 196.4

Month   Calendar Day    Year    Ref CPI      Index Ratio

October        1       2005    195.40000       1.03662
October        2       2005    195.43226       1.03679
October        3       2005    195.46452       1.03696
October        4       2005    195.49677       1.03714
October        5       2005    195.52903       1.03731
October        6       2005    195.56129       1.03748
October        7       2005    195.59355       1.03765
October        8       2005    195.62581       1.03782
October        9       2005    195.65806       1.03799
October        10      2005    195.69032       1.03816
October        11      2005    195.72258       1.03833
October        12      2005    195.75484       1.03851
October        13      2005    195.78710       1.03868
October        14      2005    195.81935       1.03885
October        15      2005    195.85161       1.03902
October        16      2005    195.88387       1.03919
October        17      2005    195.91613       1.03936
October        18      2005    195.94839       1.03953
October        19      2005    195.98065       1.03970
October        20      2005    196.01290       1.03987
October        21      2005    196.04516       1.04005
October        22      2005    196.07742       1.04022
October        23      2005    196.10968       1.04039
October        24      2005    196.14194       1.04056
October        25      2005    196.17419       1.04073
October        26      2005    196.20645       1.04090
October        27      2005    196.23871       1.04107
October        28      2005    196.27097       1.04124
October        29      2005    196.30323       1.04141
October        30      2005    196.33548       1.04159
October        31      2005    196.36774       1.04176