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3-7/8% 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-2009
CUSIP NUMBER:                           9128274Y5
DATED DATE:                             January 15, 1999
ORIGINAL ISSUE DATE:                    January 15, 1999
ADDITIONAL ISSUE DATE:                  July 15, 1999
MATURITY DATE:                          January 15, 2009
Ref CPI on DATED DATE:                  164.00000
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       1.20488
February        2       2006    197.57143       1.20470
February        3       2006    197.54286       1.20453
February        4       2006    197.51429       1.20436
February        5       2006    197.48571       1.20418
February        6       2006    197.45714       1.20401
February        7       2006    197.42857       1.20383
February        8       2006    197.40000       1.20366
February        9       2006    197.37143       1.20348
February        10      2006    197.34286       1.20331
February        11      2006    197.31429       1.20314
February        12      2006    197.28571       1.20296
February        13      2006    197.25714       1.20279
February        14      2006    197.22857       1.20261
February        15      2006    197.20000       1.20244
February        16      2006    197.17143       1.20226
February        17      2006    197.14286       1.20209
February        18      2006    197.11429       1.20192
February        19      2006    197.08571       1.20174
February        20      2006    197.05714       1.20157
February        21      2006    197.02857       1.20139
February        22      2006    197.00000       1.20122
February        23      2006    196.97143       1.20105
February        24      2006    196.94286       1.20087
February        25      2006    196.91429       1.20070
February        26      2006    196.88571       1.20052
February        27      2006    196.85714       1.20035
February        28      2006    196.82857       1.20017