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3-3/8% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due January 15, 2012

Ref CPI and Index Ratios for December 2006

    Contact: Office of Financing             202-504-3550
     DESCRIPTION:                            Series A-2012
     CUSIP NUMBER:                           9128277J5
     DATED DATE:                             January 15, 2002
     ORIGINAL ISSUE DATE:                    January 15, 2002
     ADDITIONAL ISSUE DATE:                  N/A
     MATURITY DATE:                          January 15, 2012
     Ref CPI on DATED DATE:                  177.56452
     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       1.14268
     December        2       2006    202.86452       1.14248
     December        3       2006    202.82903       1.14228
     December        4       2006    202.79355       1.14208
     December        5       2006    202.75806       1.14188
     December        6       2006    202.72258       1.14168
     December        7       2006    202.68710       1.14148
     December        8       2006    202.65161       1.14128
     December        9       2006    202.61613       1.14108
     December        10      2006    202.58065       1.14088
     December        11      2006    202.54516       1.14068
     December        12      2006    202.50968       1.14049
     December        13      2006    202.47419       1.14029
     December        14      2006    202.43871       1.14009
     December        15      2006    202.40323       1.13989
     December        16      2006    202.36774       1.13969
     December        17      2006    202.33226       1.13949
     December        18      2006    202.29677       1.13929
     December        19      2006    202.26129       1.13909
     December        20      2006    202.22581       1.13889
     December        21      2006    202.19032       1.13869
     December        22      2006    202.15484       1.13849
     December        23      2006    202.11935       1.13829
     December        24      2006    202.08387       1.13809
     December        25      2006    202.04839       1.13789
     December        26      2006    202.01290       1.13769
     December        27      2006    201.97742       1.13749
     December        28      2006    201.94194       1.13729
     December        29      2006    201.90645       1.13709
     December        30      2006    201.87097       1.13689
     December        31      2006    201.83548       1.13669