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

Ref CPI and Index Ratios for July 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:                     July 2007
     NUMBER OF DAYS IN MONTH:                31

     CPI-U (NSA) March 2007                  205.352
     CPI-U (NSA) April 2007                  206.686
     CPI-U (NSA) May 2007                    207.949

     Month   Calendar Day    Year    Ref CPI       Index Ratio

     July            1       2007    206.68600       1.16401
     July            2       2007    206.72674       1.16423
     July            3       2007    206.76748       1.16446
     July            4       2007    206.80823       1.16469
     July            5       2007    206.84897       1.16492
     July            6       2007    206.88971       1.16515
     July            7       2007    206.93045       1.16538
     July            8       2007    206.97119       1.16561
     July            9       2007    207.01194       1.16584
     July            10      2007    207.05268       1.16607
     July            11      2007    207.09342       1.16630
     July            12      2007    207.13416       1.16653
     July            13      2007    207.17490       1.16676
     July            14      2007    207.21565       1.16699
     July            15      2007    207.25639       1.16722
     July            16      2007    207.29713       1.16745
     July            17      2007    207.33787       1.16768
     July            18      2007    207.37861       1.16791
     July            19      2007    207.41935       1.16814
     July            20      2007    207.46010       1.16836
     July            21      2007    207.50084       1.16859
     July            22      2007    207.54158       1.16882
     July            23      2007    207.58232       1.16905
     July            24      2007    207.62306       1.16928
     July            25      2007    207.66381       1.16951
     July            26      2007    207.70455       1.16974
     July            27      2007    207.74529       1.16997
     July            28      2007    207.78603       1.17020
     July            29      2007    207.82677       1.17043
     July            30      2007    207.86752       1.17066
     July            31      2007    207.90826       1.17089