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2-3/8% 5-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due April 15, 2011

Ref CPI and Index Ratios for December 2006

    Contact: Office of Financing            202-504-3550
    DESCRIPTION:                            Series G-2011
    CUSIP NUMBER:                           912828FB1
    DATED DATE:                             April 15, 2006
    ORIGINAL ISSUE DATE:                    April 28, 2006
    ADDITIONAL ISSUE DATE:                  October 31, 2006
    MATURITY DATE:                          April 15, 2011
    Ref CPI on DATED DATE:                  198.48667
    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       1.02223
    December        2       2006    202.86452       1.02206
    December        3       2006    202.82903       1.02188
    December        4       2006    202.79355       1.02170
    December        5       2006    202.75806       1.02152
    December        6       2006    202.72258       1.02134
    December        7       2006    202.68710       1.02116
    December        8       2006    202.65161       1.02098
    December        9       2006    202.61613       1.02080
    December        10      2006    202.58065       1.02063
    December        11      2006    202.54516       1.02045
    December        12      2006    202.50968       1.02027
    December        13      2006    202.47419       1.02009
    December        14      2006    202.43871       1.01991
    December        15      2006    202.40323       1.01973
    December        16      2006    202.36774       1.01955
    December        17      2006    202.33226       1.01937
    December        18      2006    202.29677       1.01920
    December        19      2006    202.26129       1.01902
    December        20      2006    202.22581       1.01884
    December        21      2006    202.19032       1.01866
    December        22      2006    202.15484       1.01848
    December        23      2006    202.11935       1.01830
    December        24      2006    202.08387       1.01812
    December        25      2006    202.04839       1.01794
    December        26      2006    202.01290       1.01777
    December        27      2006    201.97742       1.01759
    December        28      2006    201.94194       1.01741
    December        29      2006    201.90645       1.01723
    December        30      2006    201.87097       1.01705
    December        31      2006    201.83548       1.01687