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4-1/4% 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-2010
CUSIP NUMBER:                           9128275W8
DATED DATE:                             January 15, 2000
ORIGINAL ISSUE DATE:                    January 18, 2000
ADDITIONAL ISSUE DATE:                  July 17, 2000
MATURITY DATE:                          January 15, 2010
Ref CPI on DATED DATE:                  168.24516
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       1.17448
February        2        2006    197.57143       1.17431
February        3        2006    197.54286       1.17414
February        4        2006    197.51429       1.17397
February        5        2006    197.48571       1.17380
February        6        2006    197.45714       1.17363
February        7        2006    197.42857       1.17346
February        8        2006    197.40000       1.17329
February        9        2006    197.37143       1.17312
February        10       2006    197.34286       1.17295
February        11       2006    197.31429       1.17278
February        12       2006    197.28571       1.17261
February        13       2006    197.25714       1.17244
February        14       2006    197.22857       1.17227
February        15       2006    197.20000       1.17210
February        16       2006    197.17143       1.17193
February        17       2006    197.14286       1.17176
February        18       2006    197.11429       1.17159
February        19       2006    197.08571       1.17142
February        20       2006    197.05714       1.17125
February        21       2006    197.02857       1.17108
February        22       2006    197.00000       1.17091
February        23       2006    196.97143       1.17074
February        24       2006    196.94286       1.17057
February        25       2006    196.91429       1.17040
February        26       2006    196.88571       1.17023
February        27       2006    196.85714       1.17006
February        28       2006    196.82857       1.16989