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

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

     CPI-U (NSA) April 2007                  206.686
     CPI-U (NSA) May 2007                    207.949
     CPI-U (NSA) June 2007                   208.352

     Month   Calendar Day    Year    Ref CPI       Index Ratio

     August          1       2007    207.94900       1.15656
     August          2       2007    207.96200       1.15663
     August          3       2007    207.97500       1.15670
     August          4       2007    207.98800       1.15677
     August          5       2007    208.00100       1.15685
     August          6       2007    208.01400       1.15692
     August          7       2007    208.02700       1.15699
     August          8       2007    208.04000       1.15706
     August          9       2007    208.05300       1.15714
     August          10      2007    208.06600       1.15721
     August          11      2007    208.07900       1.15728
     August          12      2007    208.09200       1.15735
     August          13      2007    208.10500       1.15742
     August          14      2007    208.11800       1.15750
     August          15      2007    208.13100       1.15757
     August          16      2007    208.14400       1.15764
     August          17      2007    208.15700       1.15771
     August          18      2007    208.17000       1.15779
     August          19      2007    208.18300       1.15786
     August          20      2007    208.19600       1.15793
     August          21      2007    208.20900       1.15800
     August          22      2007    208.22200       1.15808
     August          23      2007    208.23500       1.15815
     August          24      2007    208.24800       1.15822
     August          25      2007    208.26100       1.15829
     August          26      2007    208.27400       1.15836
     August          27      2007    208.28700       1.15844
     August          28      2007    208.30000       1.15851
     August          29      2007    208.31300       1.15858
     August          30      2007    208.32600       1.15865
     August          31      2007    208.33900       1.15873