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0-7/8% 5-1/2-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for September 2005

Contact: Office of Financing       202-504-3550
DESCRIPTION:                            Series D-2010
CUSIP NUMBER:                           912828CZ1
DATED DATE:                             October 15, 2004
ORIGINAL ISSUE DATE:                    October 29, 2004
ADDITIONAL ISSUE DATE:                  April 29, 2005
MATURITY DATE:                          April 15, 2010
Ref CPI on DATED DATE:                  189.44516
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       1.02668
September      2       2005    194.53000       1.02684
September      3       2005    194.56000       1.02700
September      4       2005    194.59000       1.02716
September      5       2005    194.62000       1.02732
September      6       2005    194.65000       1.02747
September      7       2005    194.68000       1.02763
September      8       2005    194.71000       1.02779
September      9       2005    194.74000       1.02795
September      10      2005    194.77000       1.02811
September      11      2005    194.80000       1.02827
September      12      2005    194.83000       1.02842
September      13      2005    194.86000       1.02858
September      14      2005    194.89000       1.02874
September      15      2005    194.92000       1.02890
September      16      2005    194.95000       1.02906
September      17      2005    194.98000       1.02922
September      18      2005    195.01000       1.02937
September      19      2005    195.04000       1.02953
September      20      2005    195.07000       1.02969
September      21      2005    195.10000       1.02985
September      22      2005    195.13000       1.03001
September      23      2005    195.16000       1.03017
September      24      2005    195.19000       1.03032
September      25      2005    195.22000       1.03048
September      26      2005    195.25000       1.03064
September      27      2005    195.28000       1.03080
September      28      2005    195.31000       1.03096
September      29      2005    195.34000       1.03112
September      30      2005    195.37000       1.03127