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

Ref CPI and Index Ratios for September 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:                     September 2007
     NUMBER OF DAYS IN MONTH:                30

     CPI-U (NSA) May 2007                    207.949
     CPI-U (NSA) June 2007                   208.352
     CPI-U (NSA) July 2007                   208.299

     Month   Calendar Day    Year    Ref CPI       Index Ratio

     September       1       2007    208.35200       1.23838
     September       2       2007    208.35023       1.23837
     September       3       2007    208.34847       1.23836
     September       4       2007    208.34670       1.23835
     September       5       2007    208.34493       1.23834
     September       6       2007    208.34317       1.23833
     September       7       2007    208.34140       1.23832
     September       8       2007    208.33963       1.23831
     September       9       2007    208.33787       1.23830
     September       10      2007    208.33610       1.23829
     September       11      2007    208.33433       1.23828
     September       12      2007    208.33257       1.23827
     September       13      2007    208.33080       1.23826
     September       14      2007    208.32903       1.23825
     September       15      2007    208.32727       1.23824
     September       16      2007    208.32550       1.23823
     September       17      2007    208.32373       1.23822
     September       18      2007    208.32197       1.23820
     September       19      2007    208.32020       1.23819
     September       20      2007    208.31843       1.23818
     September       21      2007    208.31667       1.23817
     September       22      2007    208.31490       1.23816
     September       23      2007    208.31313       1.23815
     September       24      2007    208.31137       1.23814
     September       25      2007    208.30960       1.23813
     September       26      2007    208.30783       1.23812
     September       27      2007    208.30607       1.23811
     September       28      2007    208.30430       1.23810
     September       29      2007    208.30253       1.23809
     September       30      2007    208.30077       1.23808