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

Ref CPI and Index Ratios for December 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:                     December 2006
    NUMBER OF DAYS IN MONTH:                31

    CPI-U (NSA) August 2006                 203.9
    CPI-U (NSA) September 2006              202.9
    CPI-U (NSA) October 2006                201.8

    Month   Calendar Day    Year    Ref CPI       Index Ratio

    December        1       2006    202.90000       1.16579
    December        2       2006    202.86452       1.16559
    December        3       2006    202.82903       1.16538
    December        4       2006    202.79355       1.16518
    December        5       2006    202.75806       1.16497
    December        6       2006    202.72258       1.16477
    December        7       2006    202.68710       1.16457
    December        8       2006    202.65161       1.16436
    December        9       2006    202.61613       1.16416
    December        10      2006    202.58065       1.16395
    December        11      2006    202.54516       1.16375
    December        12      2006    202.50968       1.16355
    December        13      2006    202.47419       1.16334
    December        14      2006    202.43871       1.16314
    December        15      2006    202.40323       1.16294
    December        16      2006    202.36774       1.16273
    December        17      2006    202.33226       1.16253
    December        18      2006    202.29677       1.16232
    December        19      2006    202.26129       1.16212
    December        20      2006    202.22581       1.16192
    December        21      2006    202.19032       1.16171
    December        22      2006    202.15484       1.16151
    December        23      2006    202.11935       1.16130
    December        24      2006    202.08387       1.16110
    December        25      2006    202.04839       1.16090
    December        26      2006    202.01290       1.16069
    December        27      2006    201.97742       1.16049
    December        28      2006    201.94194       1.16028
    December        29      2006    201.90645       1.16008
    December        30      2006    201.87097       1.15988
    December        31      2006    201.83548       1.15967