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

Ref CPI and Index Ratios for December 2006

    Contact: Office of Financing             202-504-3550
     DESCRIPTION:                           Series C-2012
     CUSIP NUMBER:                          912828AF7
     DATED DATE:                            July 15, 2002
     ORIGINAL ISSUE DATE:                   July 15, 2002
     ADDITIONAL ISSUE DATE:                 October 15, 2002
                                            January 15, 2003
     MATURITY DATE:                         July 15, 2012
     Ref CPI on DATED DATE:                 179.80000
     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       1.12848
     December        2       2006    202.86452       1.12828
     December        3       2006    202.82903       1.12808
     December        4       2006    202.79355       1.12788
     December        5       2006    202.75806       1.12769
     December        6       2006    202.72258       1.12749
     December        7       2006    202.68710       1.12729
     December        8       2006    202.65161       1.12709
     December        9       2006    202.61613       1.12690
     December        10      2006    202.58065       1.12670
     December        11      2006    202.54516       1.12650
     December        12      2006    202.50968       1.12631
     December        13      2006    202.47419       1.12611
     December        14      2006    202.43871       1.12591
     December        15      2006    202.40323       1.12571
     December        16      2006    202.36774       1.12552
     December        17      2006    202.33226       1.12532
     December        18      2006    202.29677       1.12512
     December        19      2006    202.26129       1.12492
     December        20      2006    202.22581       1.12473
     December        21      2006    202.19032       1.12453
     December        22      2006    202.15484       1.12433
     December        23      2006    202.11935       1.12413
     December        24      2006    202.08387       1.12394
     December        25      2006    202.04839       1.12374
     December        26      2006    202.01290       1.12354
     December        27      2006    201.97742       1.12334
     December        28      2006    201.94194       1.12315
     December        29      2006    201.90645       1.12295
     December        30      2006    201.87097       1.12275
     December        31      2006    201.83548       1.12256