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

Ref CPI and Index Ratios for September 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:                     September 2005
NUMBER OF DAYS IN MONTH:                30

CPI-U (NSA) May 2005                    194.4
CPI-U (NSA) June 2005                   194.5
CPI-U (NSA) July 2005                   195.4

Month   Calendar Day    Year    Ref CPI      Index Ratio

September      1       2005    194.50000       1.20255
September      2       2005    194.53000       1.20273
September      3       2005    194.56000       1.20292
September      4       2005    194.59000       1.20310
September      5       2005    194.62000       1.20329
September      6       2005    194.65000       1.20347
September      7       2005    194.68000       1.20366
September      8       2005    194.71000       1.20385
September      9       2005    194.74000       1.20403
September      10      2005    194.77000       1.20422
September      11      2005    194.80000       1.20440
September      12      2005    194.83000       1.20459
September      13      2005    194.86000       1.20477
September      14      2005    194.89000       1.20496
September      15      2005    194.92000       1.20514
September      16      2005    194.95000       1.20533
September      17      2005    194.98000       1.20552
September      18      2005    195.01000       1.20570
September      19      2005    195.04000       1.20589
September      20      2005    195.07000       1.20607
September      21      2005    195.10000       1.20626
September      22      2005    195.13000       1.20644
September      23      2005    195.16000       1.20663
September      24      2005    195.19000       1.20681
September      25      2005    195.22000       1.20700
September      26      2005    195.25000       1.20718
September      27      2005    195.28000       1.20737
September      28      2005    195.31000       1.20756
September      29      2005    195.34000       1.20774
September      30      2005    195.37000       1.20793