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3-1/2% 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-2011
CUSIP NUMBER:                           9128276R8
DATED DATE:                             January 15, 2001
ORIGINAL ISSUE DATE:                    January 16, 2001
ADDITIONAL ISSUE DATE:                  July 16, 2001
MATURITY DATE:                          January 15, 2011
Ref CPI on DATED DATE:                  174.04516
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       1.13534
February        2        2006    197.57143       1.13517
February        3        2006    197.54286       1.13501
February        4        2006    197.51429       1.13485
February        5        2006    197.48571       1.13468
February        6        2006    197.45714       1.13452
February        7        2006    197.42857       1.13435
February        8        2006    197.40000       1.13419
February        9        2006    197.37143       1.13402
February        10       2006    197.34286       1.13386
February        11       2006    197.31429       1.13370
February        12       2006    197.28571       1.13353
February        13       2006    197.25714       1.13337
February        14       2006    197.22857       1.13320
February        15       2006    197.20000       1.13304
February        16       2006    197.17143       1.13288
February        17       2006    197.14286       1.13271
February        18       2006    197.11429       1.13255
February        19       2006    197.08571       1.13238
February        20       2006    197.05714       1.13222
February        21       2006    197.02857       1.13205
February        22       2006    197.00000       1.13189
February        23       2006    196.97143       1.13173
February        24       2006    196.94286       1.13156
February        25       2006    196.91429       1.13140
February        26       2006    196.88571       1.13123
February        27       2006    196.85714       1.13107
February        28       2006    196.82857       1.13091