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

Ref CPI and Index Ratios for February 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:                     February 2007
     NUMBER OF DAYS IN MONTH:                28

     CPI-U (NSA) October 2006                201.8
     CPI-U (NSA) November 2006               201.5
     CPI-U (NSA) December 2006               201.8

     Month    Calendar Day   Year    Ref CPI       Index Ratio

     February        1       2007    201.50000       1.13480
     February        2       2007    201.51071       1.13486
     February        3       2007    201.52143       1.13492
     February        4       2007    201.53214       1.13498
     February        5       2007    201.54286       1.13504
     February        6       2007    201.55357       1.13510
     February        7       2007    201.56429       1.13516
     February        8       2007    201.57500       1.13522
     February        9       2007    201.58571       1.13528
     February        10      2007    201.59643       1.13534
     February        11      2007    201.60714       1.13540
     February        12      2007    201.61786       1.13546
     February        13      2007    201.62857       1.13552
     February        14      2007    201.63929       1.13558
     February        15      2007    201.65000       1.13564
     February        16      2007    201.66071       1.13570
     February        17      2007    201.67143       1.13576
     February        18      2007    201.68214       1.13582
     February        19      2007    201.69286       1.13588
     February        20      2007    201.70357       1.13595
     February        21      2007    201.71429       1.13601
     February        22      2007    201.72500       1.13607
     February        23      2007    201.73571       1.13613
     February        24      2007    201.74643       1.13619
     February        25      2007    201.75714       1.13625
     February        26      2007    201.76786       1.13631
     February        27      2007    201.77857       1.13637
     February        28      2007    201.78929       1.13643