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

Ref CPI and Index Ratios for September 2006

    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:                     September 2006
     NUMBER OF DAYS IN MONTH:                30

     CPI-U (NSA) May 2006                    202.5
     CPI-U (NSA) June 2006                   202.9
     CPI-U (NSA) July 2006                   203.5

     Month    Calendar Day    Year     Ref CPI      Index Ratio

     September       1        2006    202.90000       1.14268
     September       2        2006    202.92000       1.14280
     September       3        2006    202.94000       1.14291
     September       4        2006    202.96000       1.14302
     September       5        2006    202.98000       1.14313
     September       6        2006    203.00000       1.14325
     September       7        2006    203.02000       1.14336
     September       8        2006    203.04000       1.14347
     September       9        2006    203.06000       1.14358
     September       10       2006    203.08000       1.14370
     September       11       2006    203.10000       1.14381
     September       12       2006    203.12000       1.14392
     September       13       2006    203.14000       1.14403
     September       14       2006    203.16000       1.14415
     September       15       2006    203.18000       1.14426
     September       16       2006    203.20000       1.14437
     September       17       2006    203.22000       1.14449
     September       18       2006    203.24000       1.14460
     September       19       2006    203.26000       1.14471
     September       20       2006    203.28000       1.14482
     September       21       2006    203.30000       1.14494
     September       22       2006    203.32000       1.14505
     September       23       2006    203.34000       1.14516
     September       24       2006    203.36000       1.14527
     September       25       2006    203.38000       1.14539
     September       26       2006    203.40000       1.14550
     September       27       2006    203.42000       1.14561
     September       28       2006    203.44000       1.14572
     September       29       2006    203.46000       1.14584
     September       30       2006    203.48000       1.14595