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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 2006

    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 2006
     NUMBER OF DAYS IN MONTH:               31

     CPI-U (NSA) April 2006                 201.5
     CPI-U (NSA) May 2006                   202.5
     CPI-U (NSA) June 2006                  202.9

     Month   Calendar Day    Year    Ref CPI       Index Ratio

     August          1       2006    202.50000       1.06051
     August          2       2006    202.51290       1.06058
     August          3       2006    202.52581       1.06065
     August          4       2006    202.53871       1.06072
     August          5       2006    202.55161       1.06078
     August          6       2006    202.56452       1.06085
     August          7       2006    202.57742       1.06092
     August          8       2006    202.59032       1.06099
     August          9       2006    202.60323       1.06105
     August          10      2006    202.61613       1.06112
     August          11      2006    202.62903       1.06119
     August          12      2006    202.64194       1.06126
     August          13      2006    202.65484       1.06132
     August          14      2006    202.66774       1.06139
     August          15      2006    202.68065       1.06146
     August          16      2006    202.69355       1.06153
     August          17      2006    202.70645       1.06160
     August          18      2006    202.71935       1.06166
     August          19      2006    202.73226       1.06173
     August          20      2006    202.74516       1.06180
     August          21      2006    202.75806       1.06187
     August          22      2006    202.77097       1.06193
     August          23      2006    202.78387       1.06200
     August          24      2006    202.79677       1.06207
     August          25      2006    202.80968       1.06214
     August          26      2006    202.82258       1.06220
     August          27      2006    202.83548       1.06227
     August          28      2006    202.84839       1.06234
     August          29      2006    202.86129       1.06241
     August          30      2006    202.87419       1.06247
     August          31      2006    202.88710       1.06254