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3-1/2% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for December 2005

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:                     December 2005
NUMBER OF DAYS IN MONTH:                31

CPI-U (NSA) August 2005                 196.4
CPI-U (NSA) September 2005              198.8
CPI-U (NSA) October 2005                199.2

Month    Calendar Day    Year    Ref CPI      Index Ratio

December        1       2005    198.80000       1.14223
December        2       2005    198.81290       1.14231
December        3       2005    198.82581       1.14238
December        4       2005    198.83871       1.14245
December        5       2005    198.85161       1.14253
December        6       2005    198.86452       1.14260
December        7       2005    198.87742       1.14268
December        8       2005    198.89032       1.14275
December        9       2005    198.90323       1.14283
December        10      2005    198.91613       1.14290
December        11      2005    198.92903       1.14297
December        12      2005    198.94194       1.14305
December        13      2005    198.95484       1.14312
December        14      2005    198.96774       1.14320
December        15      2005    198.98065       1.14327
December        16      2005    198.99355       1.14334
December        17      2005    199.00645       1.14342
December        18      2005    199.01935       1.14349
December        19      2005    199.03226       1.14357
December        20      2005    199.04516       1.14364
December        21      2005    199.05806       1.14371
December        22      2005    199.07097       1.14379
December        23      2005    199.08387       1.14386
December        24      2005    199.09677       1.14394
December        25      2005    199.10968       1.14401
December        26      2005    199.12258       1.14409
December        27      2005    199.13548       1.14416
December        28      2005    199.14839       1.14423
December        29      2005    199.16129       1.14431
December        30      2005    199.17419       1.14438
December        31      2005    199.18710       1.14446