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4-1/4% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for September 2005

Contact: Office of Financing      202-504-3550
DESCRIPTION:                            Series A-2010
CUSIP NUMBER:                           9128275W8
DATED DATE:                             January 15, 2000
ORIGINAL ISSUE DATE:                    January 18, 2000
ADDITIONAL ISSUE DATE:                  July 17, 2000
MATURITY DATE:                          January 15, 2010
Ref CPI on DATED DATE:                  168.24516
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       1.15605
September      2       2005    194.53000       1.15623
September      3       2005    194.56000       1.15641
September      4       2005    194.59000       1.15659
September      5       2005    194.62000       1.15676
September      6       2005    194.65000       1.15694
September      7       2005    194.68000       1.15712
September      8       2005    194.71000       1.15730
September      9       2005    194.74000       1.15748
September      10      2005    194.77000       1.15766
September      11      2005    194.80000       1.15783
September      12      2005    194.83000       1.15801
September      13      2005    194.86000       1.15819
September      14      2005    194.89000       1.15837
September      15      2005    194.92000       1.15855
September      16      2005    194.95000       1.15873
September      17      2005    194.98000       1.15890
September      18      2005    195.01000       1.15908
September      19      2005    195.04000       1.15926
September      20      2005    195.07000       1.15944
September      21      2005    195.10000       1.15962
September      22      2005    195.13000       1.15980
September      23      2005    195.16000       1.15997
September      24      2005    195.19000       1.16015
September      25      2005    195.22000       1.16033
September      26      2005    195.25000       1.16051
September      27      2005    195.28000       1.16069
September      28      2005    195.31000       1.16087
September      29      2005    195.34000       1.16104
September      30      2005    195.37000       1.16122