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3-1/2% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due January 15, 2011

Ref CPI and Index Ratios for September 2006

    Contact: Office of Financing      202-504-3550
    DESCRIPTION:                            Series A-2011
    CUSIP NUMBER:                           9128276R8
    DATED DATE:                             January 15, 2001
    ORIGINAL ISSUE DATE:                    January 16, 2001
    ADDITIONAL ISSUE DATE:                  July 16, 2001
    MATURITY DATE:                          January 15, 2011
    Ref CPI on DATED DATE:                  174.04516
    TABLE FOR MONTH OF:                     September 2006
    NUMBER OF DAYS IN MONTH:                30

    CPI-U (NSA) May 2006                    202.5
    CPI-U (NSA) June 2006                   202.9
    CPI-U (NSA) July 2006                   203.5

    Month    Calendar Day    Year     Ref CPI      Index Ratio

    September       1        2006    202.90000       1.16579
    September       2        2006    202.92000       1.16590
    September       3        2006    202.94000       1.16602
    September       4        2006    202.96000       1.16613
    September       5        2006    202.98000       1.16625
    September       6        2006    203.00000       1.16636
    September       7        2006    203.02000       1.16648
    September       8        2006    203.04000       1.16659
    September       9        2006    203.06000       1.16671
    September       10       2006    203.08000       1.16682
    September       11       2006    203.10000       1.16694
    September       12       2006    203.12000       1.16705
    September       13       2006    203.14000       1.16717
    September       14       2006    203.16000       1.16728
    September       15       2006    203.18000       1.16740
    September       16       2006    203.20000       1.16751
    September       17       2006    203.22000       1.16763
    September       18       2006    203.24000       1.16774
    September       19       2006    203.26000       1.16786
    September       20       2006    203.28000       1.16797
    September       21       2006    203.30000       1.16809
    September       22       2006    203.32000       1.16820
    September       23       2006    203.34000       1.16832
    September       24       2006    203.36000       1.16843
    September       25       2006    203.38000       1.16855
    September       26       2006    203.40000       1.16866
    September       27       2006    203.42000       1.16878
    September       28       2006    203.44000       1.16889
    September       29       2006    203.46000       1.16901
    September       30       2006    203.48000       1.16912