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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 D-2015
CUSIP NUMBER:                           912828EA4
DATED DATE:                             July 15, 2005
ORIGINAL ISSUE DATE:                    July 15, 2005
ADDITIONAL ISSUE DATE:                  N/A
MATURITY DATE:                          July 15, 2015
Ref CPI on DATED DATE:                  194.50968
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       0.99995
September       2       2005    194.53000       1.00010
September       3       2005    194.56000       1.00026
September       4       2005    194.59000       1.00041
September       5       2005    194.62000       1.00057
September       6       2005    194.65000       1.00072
September       7       2005    194.68000       1.00088
September       8       2005    194.71000       1.00103
September       9       2005    194.74000       1.00118
September       10      2005    194.77000       1.00134
September       11      2005    194.80000       1.00149
September       12      2005    194.83000       1.00165
September       13      2005    194.86000       1.00180
September       14      2005    194.89000       1.00196
September       15      2005    194.92000       1.00211
September       16      2005    194.95000       1.00226
September       17      2005    194.98000       1.00242
September       18      2005    195.01000       1.00257
September       19      2005    195.04000       1.00273
September       20      2005    195.07000       1.00288
September       21      2005    195.10000       1.00303
September       22      2005    195.13000       1.00319
September       23      2005    195.16000       1.00334
September       24      2005    195.19000       1.00350
September       25      2005    195.22000       1.00365
September       26      2005    195.25000       1.00381
September       27      2005    195.28000       1.00396
September       28      2005    195.31000       1.00411
September       29      2005    195.34000       1.00427
September       30      2005    195.37000       1.00442