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3-3/8% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due January 15, 2007

Ref CPI and Index Ratios for December 2006

    Contact: Office of Financing            202-504-3550

    DESCRIPTION:                           Series A-2007
    CUSIP NUMBER:                          9128272M3
    DATED DATE:                            January 15, 1997
    ORIGINAL ISSUE DATE:                   February 6, 1997
    ADDITIONAL ISSUE DATE:                 April 15, 1997
    MATURITY DATE:                         January 15, 2007
    Ref CPI on DATED DATE:                 158.43548
    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       1.28065
    December        2       2006    202.86452       1.28042
    December        3       2006    202.82903       1.28020
    December        4       2006    202.79355       1.27998
    December        5       2006    202.75806       1.27975
    December        6       2006    202.72258       1.27953
    December        7       2006    202.68710       1.27930
    December        8       2006    202.65161       1.27908
    December        9       2006    202.61613       1.27886
    December        10      2006    202.58065       1.27863
    December        11      2006    202.54516       1.27841
    December        12      2006    202.50968       1.27818
    December        13      2006    202.47419       1.27796
    December        14      2006    202.43871       1.27774
    December        15      2006    202.40323       1.27751
    December        16      2006    202.36774       1.27729
    December        17      2006    202.33226       1.27706
    December        18      2006    202.29677       1.27684
    December        19      2006    202.26129       1.27662
    December        20      2006    202.22581       1.27639
    December        21      2006    202.19032       1.27617
    December        22      2006    202.15484       1.27594
    December        23      2006    202.11935       1.27572
    December        24      2006    202.08387       1.27550
    December        25      2006    202.04839       1.27527
    December        26      2006    202.01290       1.27505
    December        27      2006    201.97742       1.27482
    December        28      2006    201.94194       1.27460
    December        29      2006    201.90645       1.27438
    December        30      2006    201.87097       1.27415
    December        31      2006    201.83548       1.27393