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0-7/8% 5-1/2-YEAR TREASURY INFLATION-PROTECTED SECURITIES Due April 15, 2010

Ref CPI and Index Ratios for August 2006

    Contact: Office of Financing       202-504-3550

   DESCRIPTION:                            Series D-2010
   CUSIP NUMBER:                           912828CZ1
   DATED DATE:                             October 15, 2004
   ORIGINAL ISSUE DATE:                    October 29, 2004
   ADDITIONAL ISSUE DATE:                  April 29, 2005
                                           October 28, 2005
   MATURITY DATE:                          April 15, 2010
   Ref CPI on DATED DATE:                  189.44516
   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       1.06891
   August          2       2006    202.51290       1.06898
   August          3       2006    202.52581       1.06905
   August          4       2006    202.53871       1.06912
   August          5       2006    202.55161       1.06918
   August          6       2006    202.56452       1.06925
   August          7       2006    202.57742       1.06932
   August          8       2006    202.59032       1.06939
   August          9       2006    202.60323       1.06946
   August          10      2006    202.61613       1.06952
   August          11      2006    202.62903       1.06959
   August          12      2006    202.64194       1.06966
   August          13      2006    202.65484       1.06973
   August          14      2006    202.66774       1.06980
   August          15      2006    202.68065       1.06986
   August          16      2006    202.69355       1.06993
   August          17      2006    202.70645       1.07000
   August          18      2006    202.71935       1.07007
   August          19      2006    202.73226       1.07014
   August          20      2006    202.74516       1.07021
   August          21      2006    202.75806       1.07027
   August          22      2006    202.77097       1.07034
   August          23      2006    202.78387       1.07041
   August          24      2006    202.79677       1.07048
   August          25      2006    202.80968       1.07055
   August          26      2006    202.82258       1.07061
   August          27      2006    202.83548       1.07068
   August          28      2006    202.84839       1.07075
   August          29      2006    202.86129       1.07082
   August          30      2006    202.87419       1.07089
   August          31      2006    202.88710       1.07095