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3-5/8% 30-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for October 2005

Contact: Office of Financing       202-504-3550
DESCRIPTION:                            TIPS of April 2028
CUSIP NUMBER:                           912810FD5
DATED DATE:                             April 15, 1998
ORIGINAL ISSUE DATE:                    April 15, 1998
ADDITIONAL ISSUE DATE:                  July 15, 1998
MATURITY DATE:                          April 15, 2028
Ref CPI on DATED DATE:                  161.74000
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       1.20811
October        2       2005    195.43226       1.20831
October        3       2005    195.46452       1.20851
October        4       2005    195.49677       1.20871
October        5       2005    195.52903       1.20891
October        6       2005    195.56129       1.20911
October        7       2005    195.59355       1.20931
October        8       2005    195.62581       1.20951
October        9       2005    195.65806       1.20971
October        10      2005    195.69032       1.20991
October        11      2005    195.72258       1.21011
October        12      2005    195.75484       1.21031
October        13      2005    195.78710       1.21051
October        14      2005    195.81935       1.21070
October        15      2005    195.85161       1.21090
October        16      2005    195.88387       1.21110
October        17      2005    195.91613       1.21130
October        18      2005    195.94839       1.21150
October        19      2005    195.98065       1.21170
October        20      2005    196.01290       1.21190
October        21      2005    196.04516       1.21210
October        22      2005    196.07742       1.21230
October        23      2005    196.10968       1.21250
October        24      2005    196.14194       1.21270
October        25      2005    196.17419       1.21290
October        26      2005    196.20645       1.21310
October        27      2005    196.23871       1.21330
October        28      2005    196.27097       1.21350
October        29      2005    196.30323       1.21370
October        30      2005    196.33548       1.21390
October        31      2005    196.36774       1.21410