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4-1/4% 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-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:                     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       1.18399
January         2       2006    199.14839       1.18368
January         3       2006    199.09677       1.18337
January         4       2006    199.04516       1.18307
January         5       2006    198.99355       1.18276
January         6       2006    198.94194       1.18245
January         7       2006    198.89032       1.18215
January         8       2006    198.83871       1.18184
January         9       2006    198.78710       1.18153
January         10      2006    198.73548       1.18123
January         11      2006    198.68387       1.18092
January         12      2006    198.63226       1.18061
January         13      2006    198.58065       1.18031
January         14      2006    198.52903       1.18000
January         15      2006    198.47742       1.17969
January         16      2006    198.42581       1.17938
January         17      2006    198.37419       1.17908
January         18      2006    198.32258       1.17877
January         19      2006    198.27097       1.17846
January         20      2006    198.21935       1.17816
January         21      2006    198.16774       1.17785
January         22      2006    198.11613       1.17754
January         23      2006    198.06452       1.17724
January         24      2006    198.01290       1.17693
January         25      2006    197.96129       1.17662
January         26      2006    197.90968       1.17632
January         27      2006    197.85806       1.17601
January         28      2006    197.80645       1.17570
January         29      2006    197.75484       1.17540
January         30      2006    197.70323       1.17509
January         31      2006    197.65161       1.17478