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

Ref CPI and Index Ratios for September 2007

     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:                     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       1.15880
     September       2       2007    208.35023       1.15879
     September       3       2007    208.34847       1.15878
     September       4       2007    208.34670       1.15877
     September       5       2007    208.34493       1.15876
     September       6       2007    208.34317       1.15875
     September       7       2007    208.34140       1.15874
     September       8       2007    208.33963       1.15873
     September       9       2007    208.33787       1.15872
     September       10      2007    208.33610       1.15871
     September       11      2007    208.33433       1.15870
     September       12      2007    208.33257       1.15869
     September       13      2007    208.33080       1.15868
     September       14      2007    208.32903       1.15867
     September       15      2007    208.32727       1.15866
     September       16      2007    208.32550       1.15865
     September       17      2007    208.32373       1.15864
     September       18      2007    208.32197       1.15863
     September       19      2007    208.32020       1.15862
     September       20      2007    208.31843       1.15861
     September       21      2007    208.31667       1.15860
     September       22      2007    208.31490       1.15859
     September       23      2007    208.31313       1.15858
     September       24      2007    208.31137       1.15857
     September       25      2007    208.30960       1.15856
     September       26      2007    208.30783       1.15855
     September       27      2007    208.30607       1.15854
     September       28      2007    208.30430       1.15853
     September       29      2007    208.30253       1.15852
     September       30      2007    208.30077       1.15851