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3-7/8% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due January 15, 2009

Ref CPI and Index Ratios for December 2006

    Contact: Office of Financing           202-504-3550
   DESCRIPTION:                            Series A-2009
   CUSIP NUMBER:                           9128274Y5
   DATED DATE:                             January 15, 1999
   ORIGINAL ISSUE DATE:                    January 15, 1999
   ADDITIONAL ISSUE DATE:                  July 15, 1999
   MATURITY DATE:                          January 15, 2009
   Ref CPI on DATED DATE:                  164.00000
   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       1.23720
   December        2       2006    202.86452       1.23698
   December        3       2006    202.82903       1.23676
   December        4       2006    202.79355       1.23655
   December        5       2006    202.75806       1.23633
   December        6       2006    202.72258       1.23611
   December        7       2006    202.68710       1.23590
   December        8       2006    202.65161       1.23568
   December        9       2006    202.61613       1.23546
   December        10      2006    202.58065       1.23525
   December        11      2006    202.54516       1.23503
   December        12      2006    202.50968       1.23482
   December        13      2006    202.47419       1.23460
   December        14      2006    202.43871       1.23438
   December        15      2006    202.40323       1.23417
   December        16      2006    202.36774       1.23395
   December        17      2006    202.33226       1.23373
   December        18      2006    202.29677       1.23352
   December        19      2006    202.26129       1.23330
   December        20      2006    202.22581       1.23308
   December        21      2006    202.19032       1.23287
   December        22      2006    202.15484       1.23265
   December        23      2006    202.11935       1.23244
   December        24      2006    202.08387       1.23222
   December        25      2006    202.04839       1.23200
   December        26      2006    202.01290       1.23179
   December        27      2006    201.97742       1.23157
   December        28      2006    201.94194       1.23135
   December        29      2006    201.90645       1.23114
   December        30      2006    201.87097       1.23092
   December        31      2006    201.83548       1.23070