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

Ref CPI and Index Ratios for August 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:                     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       1.17112
     August          2       2007    207.96200       1.17119
     August          3       2007    207.97500       1.17126
     August          4       2007    207.98800       1.17134
     August          5       2007    208.00100       1.17141
     August          6       2007    208.01400       1.17148
     August          7       2007    208.02700       1.17156
     August          8       2007    208.04000       1.17163
     August          9       2007    208.05300       1.17170
     August          10      2007    208.06600       1.17178
     August          11      2007    208.07900       1.17185
     August          12      2007    208.09200       1.17192
     August          13      2007    208.10500       1.17200
     August          14      2007    208.11800       1.17207
     August          15      2007    208.13100       1.17214
     August          16      2007    208.14400       1.17222
     August          17      2007    208.15700       1.17229
     August          18      2007    208.17000       1.17236
     August          19      2007    208.18300       1.17244
     August          20      2007    208.19600       1.17251
     August          21      2007    208.20900       1.17258
     August          22      2007    208.22200       1.17266
     August          23      2007    208.23500       1.17273
     August          24      2007    208.24800       1.17280
     August          25      2007    208.26100       1.17288
     August          26      2007    208.27400       1.17295
     August          27      2007    208.28700       1.17302
     August          28      2007    208.30000       1.17309
     August          29      2007    208.31300       1.17317
     August          30      2007    208.32600       1.17324
     August          31      2007    208.33900       1.17331