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3-3/8% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due January 15, 2012

Ref CPI and Index Ratios for September 2007

     Contact: Office of Financing            202-504-3550
     DESCRIPTION:                            Series A-2012
     CUSIP NUMBER:                           9128277J5
     DATED DATE:                             January 15, 2002
     ORIGINAL ISSUE DATE:                    January 15, 2002
     ADDITIONAL ISSUE DATE:                  N/A
     MATURITY DATE:                          January 15, 2012
     Ref CPI on DATED DATE:                  177.56452
     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       1.17339
     September       2       2007    208.35023       1.17338
     September       3       2007    208.34847       1.17337
     September       4       2007    208.34670       1.17336
     September       5       2007    208.34493       1.17335
     September       6       2007    208.34317       1.17334
     September       7       2007    208.34140       1.17333
     September       8       2007    208.33963       1.17332
     September       9       2007    208.33787       1.17331
     September       10      2007    208.33610       1.17330
     September       11      2007    208.33433       1.17329
     September       12      2007    208.33257       1.17328
     September       13      2007    208.33080       1.17327
     September       14      2007    208.32903       1.17326
     September       15      2007    208.32727       1.17325
     September       16      2007    208.32550       1.17324
     September       17      2007    208.32373       1.17323
     September       18      2007    208.32197       1.17322
     September       19      2007    208.32020       1.17321
     September       20      2007    208.31843       1.17320
     September       21      2007    208.31667       1.17319
     September       22      2007    208.31490       1.17318
     September       23      2007    208.31313       1.17317
     September       24      2007    208.31137       1.17316
     September       25      2007    208.30960       1.17315
     September       26      2007    208.30783       1.17314
     September       27      2007    208.30607       1.17313
     September       28      2007    208.30430       1.17312
     September       29      2007    208.30253       1.17311
     September       30      2007    208.30077       1.17310