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4-1/4% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due January 15, 2010

Ref CPI and Index Ratios for January 2007

    Contact: Office of Financing             202-504-3550
     DESCRIPTION:                            Series A-2010
     CUSIP NUMBER:                           9128275W8
     DATED DATE:                             January 15, 2000
     ORIGINAL ISSUE DATE:                    January 18, 2000
     ADDITIONAL ISSUE DATE:                  July 17, 2000
     MATURITY DATE:                          January 15, 2010
     Ref CPI on DATED DATE:                  168.24516
     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       1.19944
     January         2       2007    201.79032       1.19938
     January         3       2007    201.78065       1.19933
     January         4       2007    201.77097       1.19927
     January         5       2007    201.76129       1.19921
     January         6       2007    201.75161       1.19915
     January         7       2007    201.74194       1.19910
     January         8       2007    201.73226       1.19904
     January         9       2007    201.72258       1.19898
     January         10      2007    201.71290       1.19892
     January         11      2007    201.70323       1.19886
     January         12      2007    201.69355       1.19881
     January         13      2007    201.68387       1.19875
     January         14      2007    201.67419       1.19869
     January         15      2007    201.66452       1.19863
     January         16      2007    201.65484       1.19858
     January         17      2007    201.64516       1.19852
     January         18      2007    201.63548       1.19846
     January         19      2007    201.62581       1.19840
     January         20      2007    201.61613       1.19835
     January         21      2007    201.60645       1.19829
     January         22      2007    201.59677       1.19823
     January         23      2007    201.58710       1.19817
     January         24      2007    201.57742       1.19812
     January         25      2007    201.56774       1.19806
     January         26      2007    201.55806       1.19800
     January         27      2007    201.54839       1.19794
     January         28      2007    201.53871       1.19789
     January         29      2007    201.52903       1.19783
     January         30      2007    201.51935       1.19777
     January         31      2007    201.50968       1.19771