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1-7/8% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for September 2005

Contact: Office of Financing       202-504-3550
DESCRIPTION:                            Series C-2013
CUSIP NUMBER:                           912828BD1
DATED DATE:                             July 15, 2003
ORIGINAL ISSUE DATE:                    July 15, 2003
ADDITIONAL ISSUE DATE:                  October 15, 2003
MATURITY DATE:                          July 15, 2013
Ref CPI on DATED DATE:                  183.66452
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       1.05900
September      2       2005    194.53000       1.05916
September      3       2005    194.56000       1.05932
September      4       2005    194.59000       1.05949
September      5       2005    194.62000       1.05965
September      6       2005    194.65000       1.05981
September      7       2005    194.68000       1.05998
September      8       2005    194.71000       1.06014
September      9       2005    194.74000       1.06030
September      10      2005    194.77000       1.06047
September      11      2005    194.80000       1.06063
September      12      2005    194.83000       1.06079
September      13      2005    194.86000       1.06096
September      14      2005    194.89000       1.06112
September      15      2005    194.92000       1.06128
September      16      2005    194.95000       1.06145
September      17      2005    194.98000       1.06161
September      18      2005    195.01000       1.06177
September      19      2005    195.04000       1.06194
September      20      2005    195.07000       1.06210
September      21      2005    195.10000       1.06226
September      22      2005    195.13000       1.06243
September      23      2005    195.16000       1.06259
September      24      2005    195.19000       1.06275
September      25      2005    195.22000       1.06292
September      26      2005    195.25000       1.06308
September      27      2005    195.28000       1.06324
September      28      2005    195.31000       1.06341
September      29      2005    195.34000       1.06357
September      30      2005    195.37000       1.06373