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

Ref CPI and Index Ratios for January 2007

    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:                     January 2007
   NUMBER OF DAYS IN MONTH:                31

   CPI-U (NSA) September 2006              202.9
   CPI-U (NSA) October 2006                201.8
   CPI-U (NSA) November 2006               201.5

   Month   Calendar Day    Year    Ref CPI       Index Ratio

   January         1       2007    201.80000       1.23049
   January         2       2007    201.79032       1.23043
   January         3       2007    201.78065       1.23037
   January         4       2007    201.77097       1.23031
   January         5       2007    201.76129       1.23025
   January         6       2007    201.75161       1.23019
   January         7       2007    201.74194       1.23013
   January         8       2007    201.73226       1.23007
   January         9       2007    201.72258       1.23002
   January         10      2007    201.71290       1.22996
   January         11      2007    201.70323       1.22990
   January         12      2007    201.69355       1.22984
   January         13      2007    201.68387       1.22978
   January         14      2007    201.67419       1.22972
   January         15      2007    201.66452       1.22966
   January         16      2007    201.65484       1.22960
   January         17      2007    201.64516       1.22954
   January         18      2007    201.63548       1.22948
   January         19      2007    201.62581       1.22943
   January         20      2007    201.61613       1.22937
   January         21      2007    201.60645       1.22931
   January         22      2007    201.59677       1.22925
   January         23      2007    201.58710       1.22919
   January         24      2007    201.57742       1.22913
   January         25      2007    201.56774       1.22907
   January         26      2007    201.55806       1.22901
   January         27      2007    201.54839       1.22895
   January         28      2007    201.53871       1.22889
   January         29      2007    201.52903       1.22884
   January         30      2007    201.51935       1.22878
   January         31      2007    201.50968       1.22872