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0-7/8% 5-1/2-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for October 2005

Contact: Office of Financing       202-504-3550
DESCRIPTION:                            Series D-2010
CUSIP NUMBER:                           912828CZ1
DATED DATE:                             October 15, 2004
ORIGINAL ISSUE DATE:                    October 29, 2004
ADDITIONAL ISSUE DATE:                  April 29, 2005
MATURITY DATE:                          April 15, 2010
Ref CPI on DATED DATE:                  189.44516
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       1.03143
October        2       2005    195.43226       1.03160
October        3       2005    195.46452       1.03177
October        4       2005    195.49677       1.03194
October        5       2005    195.52903       1.03211
October        6       2005    195.56129       1.03228
October        7       2005    195.59355       1.03245
October        8       2005    195.62581       1.03263
October        9       2005    195.65806       1.03280
October        10      2005    195.69032       1.03297
October        11      2005    195.72258       1.03314
October        12      2005    195.75484       1.03331
October        13      2005    195.78710       1.03348
October        14      2005    195.81935       1.03365
October        15      2005    195.85161       1.03382
October        16      2005    195.88387       1.03399
October        17      2005    195.91613       1.03416
October        18      2005    195.94839       1.03433
October        19      2005    195.98065       1.03450
October        20      2005    196.01290       1.03467
October        21      2005    196.04516       1.03484
October        22      2005    196.07742       1.03501
October        23      2005    196.10968       1.03518
October        24      2005    196.14194       1.03535
October        25      2005    196.17419       1.03552
October        26      2005    196.20645       1.03569
October        27      2005    196.23871       1.03586
October        28      2005    196.27097       1.03603
October        29      2005    196.30323       1.03620
October        30      2005    196.33548       1.03637
October        31      2005    196.36774       1.03654