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3-1/2% 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-2011
CUSIP NUMBER:                           9128276R8
DATED DATE:                             January 15, 2001
ORIGINAL ISSUE DATE:                    January 16, 2001
ADDITIONAL ISSUE DATE:                  July 16, 2001
MATURITY DATE:                          January 15, 2011
Ref CPI on DATED DATE:                  174.04516
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       1.14453
January         2       2006    199.14839       1.14423
January         3       2006    199.09677       1.14394
January         4       2006    199.04516       1.14364
January         5       2006    198.99355       1.14334
January         6       2006    198.94194       1.14305
January         7       2006    198.89032       1.14275
January         8       2006    198.83871       1.14245
January         9       2006    198.78710       1.14216
January         10      2006    198.73548       1.14186
January         11      2006    198.68387       1.14157
January         12      2006    198.63226       1.14127
January         13      2006    198.58065       1.14097
January         14      2006    198.52903       1.14068
January         15      2006    198.47742       1.14038
January         16      2006    198.42581       1.14008
January         17      2006    198.37419       1.13979
January         18      2006    198.32258       1.13949
January         19      2006    198.27097       1.13919
January         20      2006    198.21935       1.13890
January         21      2006    198.16774       1.13860
January         22      2006    198.11613       1.13830
January         23      2006    198.06452       1.13801
January         24      2006    198.01290       1.13771
January         25      2006    197.96129       1.13741
January         26      2006    197.90968       1.13712
January         27      2006    197.85806       1.13682
January         28      2006    197.80645       1.13652
January         29      2006    197.75484       1.13623
January         30      2006    197.70323       1.13593
January         31      2006    197.65161       1.13563