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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-2016
CUSIP NUMBER:                           912828ET3
DATED DATE:                             January 15, 2006
ORIGINAL ISSUE DATE:                    January 17, 2006
ADDITIONAL ISSUE DATE:                  N/A
MATURITY DATE:                          January 15, 2016
Ref CPI on DATED DATE:                  198.47742
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       0.99558
February        2       2006    197.57143       0.99544
February        3       2006    197.54286       0.99529
February        4       2006    197.51429       0.99515
February        5       2006    197.48571       0.99500
February        6       2006    197.45714       0.99486
February        7       2006    197.42857       0.99472
February        8       2006    197.40000       0.99457
February        9       2006    197.37143       0.99443
February        10      2006    197.34286       0.99428
February        11      2006    197.31429       0.99414
February        12      2006    197.28571       0.99400
February        13      2006    197.25714       0.99385
February        14      2006    197.22857       0.99371
February        15      2006    197.20000       0.99356
February        16      2006    197.17143       0.99342
February        17      2006    197.14286       0.99328
February        18      2006    197.11429       0.99313
February        19      2006    197.08571       0.99299
February        20      2006    197.05714       0.99284
February        21      2006    197.02857       0.99270
February        22      2006    197.00000       0.99256
February        23      2006    196.97143       0.99241
February        24      2006    196.94286       0.99227
February        25      2006    196.91429       0.99212
February        26      2006    196.88571       0.99198
February        27      2006    196.85714       0.99184
February        28      2006    196.82857       0.99169