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

Ref CPI and Index Ratios for September 2006

    Contact: Office of Financing       202-504-3550
     DESCRIPTION:                            Series C-2012
     CUSIP NUMBER:                           912828AF7
     DATED DATE:                             July 15, 2002
     ORIGINAL ISSUE DATE:                    July 15, 2002
     ADDITIONAL ISSUE DATE:                  October 15, 2002
                                             January 15, 2003
     MATURITY DATE:                          July 15, 2012
     Ref CPI on DATED DATE:                  179.80000
     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       1.12848
     September       2        2006    202.92000       1.12859
     September       3        2006    202.94000       1.12870
     September       4        2006    202.96000       1.12881
     September       5        2006    202.98000       1.12892
     September       6        2006    203.00000       1.12903
     September       7        2006    203.02000       1.12914
     September       8        2006    203.04000       1.12925
     September       9        2006    203.06000       1.12937
     September       10       2006    203.08000       1.12948
     September       11       2006    203.10000       1.12959
     September       12       2006    203.12000       1.12970
     September       13       2006    203.14000       1.12981
     September       14       2006    203.16000       1.12992
     September       15       2006    203.18000       1.13003
     September       16       2006    203.20000       1.13014
     September       17       2006    203.22000       1.13026
     September       18       2006    203.24000       1.13037
     September       19       2006    203.26000       1.13048
     September       20       2006    203.28000       1.13059
     September       21       2006    203.30000       1.13070
     September       22       2006    203.32000       1.13081
     September       23       2006    203.34000       1.13092
     September       24       2006    203.36000       1.13103
     September       25       2006    203.38000       1.13115
     September       26       2006    203.40000       1.13126
     September       27       2006    203.42000       1.13137
     September       28       2006    203.44000       1.13148
     September       29       2006    203.46000       1.13159
     September       30       2006    203.48000       1.13170