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1-5/8% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due January 15, 2015

Ref CPI and Index Ratios for August 2007

     Contact: Office of Financing            202-504-3550
     DESCRIPTION:                            Series A-2015
     CUSIP NUMBER:                           912828DH0
     DATED DATE:                             January 15, 2005
     ORIGINAL ISSUE DATE:                    January 18, 2005
     ADDITIONAL ISSUE DATE:                  April 15, 2005
     MATURITY DATE:                          January 15, 2015
     Ref CPI on DATED DATE:                  190.94516
     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       1.08905
     August          2       2007    207.96200       1.08912
     August          3       2007    207.97500       1.08919
     August          4       2007    207.98800       1.08926
     August          5       2007    208.00100       1.08932
     August          6       2007    208.01400       1.08939
     August          7       2007    208.02700       1.08946
     August          8       2007    208.04000       1.08953
     August          9       2007    208.05300       1.08960
     August          10      2007    208.06600       1.08966
     August          11      2007    208.07900       1.08973
     August          12      2007    208.09200       1.08980
     August          13      2007    208.10500       1.08987
     August          14      2007    208.11800       1.08994
     August          15      2007    208.13100       1.09000
     August          16      2007    208.14400       1.09007
     August          17      2007    208.15700       1.09014
     August          18      2007    208.17000       1.09021
     August          19      2007    208.18300       1.09028
     August          20      2007    208.19600       1.09034
     August          21      2007    208.20900       1.09041
     August          22      2007    208.22200       1.09048
     August          23      2007    208.23500       1.09055
     August          24      2007    208.24800       1.09062
     August          25      2007    208.26100       1.09068
     August          26      2007    208.27400       1.09075
     August          27      2007    208.28700       1.09082
     August          28      2007    208.30000       1.09089
     August          29      2007    208.31300       1.09096
     August          30      2007    208.32600       1.09103
     August          31      2007    208.33900       1.09109