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3% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for February 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:                     February 2006
NUMBER OF DAYS IN MONTH:                28

CPI-U (NSA) October 2005                199.2
CPI-U (NSA) November 2005               197.6
CPI-U (NSA) December 2005               196.8

Month    Calendar Day    Year    Ref CPI       Index Ratio

February        1        2006    197.60000       1.09900
February        2        2006    197.57143       1.09884
February        3        2006    197.54286       1.09868
February        4        2006    197.51429       1.09852
February        5        2006    197.48571       1.09836
February        6        2006    197.45714       1.09820
February        7        2006    197.42857       1.09805
February        8        2006    197.40000       1.09789
February        9        2006    197.37143       1.09773
February        10       2006    197.34286       1.09757
February        11       2006    197.31429       1.09741
February        12       2006    197.28571       1.09725
February        13       2006    197.25714       1.09709
February        14       2006    197.22857       1.09693
February        15       2006    197.20000       1.09677
February        16       2006    197.17143       1.09662
February        17       2006    197.14286       1.09646
February        18       2006    197.11429       1.09630
February        19       2006    197.08571       1.09614
February        20       2006    197.05714       1.09598
February        21       2006    197.02857       1.09582
February        22       2006    197.00000       1.09566
February        23       2006    196.97143       1.09550
February        24       2006    196.94286       1.09534
February        25       2006    196.91429       1.09519
February        26       2006    196.88571       1.09503
February        27       2006    196.85714       1.09487
February        28       2006    196.82857       1.09471