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

Ref CPI and Index Ratios for September 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:                     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       1.03185
September      2       2005    194.53000       1.03201
September      3       2005    194.56000       1.03217
September      4       2005    194.59000       1.03233
September      5       2005    194.62000       1.03248
September      6       2005    194.65000       1.03264
September      7       2005    194.68000       1.03280
September      8       2005    194.71000       1.03296
September      9       2005    194.74000       1.03312
September      10      2005    194.77000       1.03328
September      11      2005    194.80000       1.03344
September      12      2005    194.83000       1.03360
September      13      2005    194.86000       1.03376
September      14      2005    194.89000       1.03392
September      15      2005    194.92000       1.03408
September      16      2005    194.95000       1.03424
September      17      2005    194.98000       1.03439
September      18      2005    195.01000       1.03455
September      19      2005    195.04000       1.03471
September      20      2005    195.07000       1.03487
September      21      2005    195.10000       1.03503
September      22      2005    195.13000       1.03519
September      23      2005    195.16000       1.03535
September      24      2005    195.19000       1.03551
September      25      2005    195.22000       1.03567
September      26      2005    195.25000       1.03583
September      27      2005    195.28000       1.03599
September      28      2005    195.31000       1.03615
September      29      2005    195.34000       1.03630
September      30      2005    195.37000       1.03646