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3-3/8% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for February 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:                     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       1.11283
February        2        2006    197.57143       1.11267
February        3        2006    197.54286       1.11251
February        4        2006    197.51429       1.11235
February        5        2006    197.48571       1.11219
February        6        2006    197.45714       1.11203
February        7        2006    197.42857       1.11187
February        8        2006    197.40000       1.11171
February        9        2006    197.37143       1.11155
February        10       2006    197.34286       1.11139
February        11       2006    197.31429       1.11123
February        12       2006    197.28571       1.11106
February        13       2006    197.25714       1.11090
February        14       2006    197.22857       1.11074
February        15       2006    197.20000       1.11058
February        16       2006    197.17143       1.11042
February        17       2006    197.14286       1.11026
February        18       2006    197.11429       1.11010
February        19       2006    197.08571       1.10994
February        20       2006    197.05714       1.10978
February        21       2006    197.02857       1.10962
February        22       2006    197.00000       1.10946
February        23       2006    196.97143       1.10929
February        24       2006    196.94286       1.10913
February        25       2006    196.91429       1.10897
February        26       2006    196.88571       1.10881
February        27       2006    196.85714       1.10865
February        28       2006    196.82857       1.10849