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4-1/4% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due January 15, 2010

Ref CPI and Index Ratios for August 2006

    Contact: Office of Financing      202-504-3550
     DESCRIPTION:                          Series A-2010
     CUSIP NUMBER:                         9128275W8
     DATED DATE:                           January 15, 2000
     ORIGINAL ISSUE DATE:                  January 18, 2000
     ADDITIONAL ISSUE DATE:                July 17, 2000
     MATURITY DATE:                        January 15, 2010
     Ref CPI on DATED DATE:                168.24516
     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       1.20360
     August          2       2006    202.51290       1.20368
     August          3       2006    202.52581       1.20375
     August          4       2006    202.53871       1.20383
     August          5       2006    202.55161       1.20391
     August          6       2006    202.56452       1.20398
     August          7       2006    202.57742       1.20406
     August          8       2006    202.59032       1.20414
     August          9       2006    202.60323       1.20421
     August          10      2006    202.61613       1.20429
     August          11      2006    202.62903       1.20437
     August          12      2006    202.64194       1.20444
     August          13      2006    202.65484       1.20452
     August          14      2006    202.66774       1.20460
     August          15      2006    202.68065       1.20467
     August          16      2006    202.69355       1.20475
     August          17      2006    202.70645       1.20483
     August          18      2006    202.71935       1.20490
     August          19      2006    202.73226       1.20498
     August          20      2006    202.74516       1.20506
     August          21      2006    202.75806       1.20513
     August          22      2006    202.77097       1.20521
     August          23      2006    202.78387       1.20529
     August          24      2006    202.79677       1.20536
     August          25      2006    202.80968       1.20544
     August          26      2006    202.82258       1.20552
     August          27      2006    202.83548       1.20559
     August          28      2006    202.84839       1.20567
     August          29      2006    202.86129       1.20575
     August          30      2006    202.87419       1.20582
     August          31      2006    202.88710       1.20590