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3-7/8% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for January 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:                     January 2006
NUMBER OF DAYS IN MONTH:                31

CPI-U (NSA) September 2005              198.8
CPI-U (NSA) October 2005                199.2
CPI-U (NSA) November 2005               197.6

Month   Calendar Day    Year    Ref CPI       Index Ratio

January         1       2006    199.20000       1.21463
January         2       2006    199.14839       1.21432
January         3       2006    199.09677       1.21400
January         4       2006    199.04516       1.21369
January         5       2006    198.99355       1.21338
January         6       2006    198.94194       1.21306
January         7       2006    198.89032       1.21275
January         8       2006    198.83871       1.21243
January         9       2006    198.78710       1.21212
January         10      2006    198.73548       1.21180
January         11      2006    198.68387       1.21149
January         12      2006    198.63226       1.21117
January         13      2006    198.58065       1.21086
January         14      2006    198.52903       1.21054
January         15      2006    198.47742       1.21023
January         16      2006    198.42581       1.20991
January         17      2006    198.37419       1.20960
January         18      2006    198.32258       1.20928
January         19      2006    198.27097       1.20897
January         20      2006    198.21935       1.20865
January         21      2006    198.16774       1.20834
January         22      2006    198.11613       1.20803
January         23      2006    198.06452       1.20771
January         24      2006    198.01290       1.20740
January         25      2006    197.96129       1.20708
January         26      2006    197.90968       1.20677
January         27      2006    197.85806       1.20645
January         28      2006    197.80645       1.20614
January         29      2006    197.75484       1.20582
January         30      2006    197.70323       1.20551
January         31      2006    197.65161       1.20519