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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-2014
CUSIP NUMBER:                           912828BW9
DATED DATE:                             January 15, 2004
ORIGINAL ISSUE DATE:                    January 15, 2004
ADDITIONAL ISSUE DATE:                  April 15, 2004
MATURITY DATE:                          January 15, 2014
Ref CPI on DATED DATE:                  184.77419
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       1.07591
December        2       2005    198.81290       1.07598
December        3       2005    198.82581       1.07605
December        4       2005    198.83871       1.07612
December        5       2005    198.85161       1.07619
December        6       2005    198.86452       1.07626
December        7       2005    198.87742       1.07633
December        8       2005    198.89032       1.07640
December        9       2005    198.90323       1.07647
December        10      2005    198.91613       1.07654
December        11      2005    198.92903       1.07661
December        12      2005    198.94194       1.07668
December        13      2005    198.95484       1.07675
December        14      2005    198.96774       1.07682
December        15      2005    198.98065       1.07689
December        16      2005    198.99355       1.07696
December        17      2005    199.00645       1.07703
December        18      2005    199.01935       1.07709
December        19      2005    199.03226       1.07716
December        20      2005    199.04516       1.07723
December        21      2005    199.05806       1.07730
December        22      2005    199.07097       1.07737
December        23      2005    199.08387       1.07744
December        24      2005    199.09677       1.07751
December        25      2005    199.10968       1.07758
December        26      2005    199.12258       1.07765
December        27      2005    199.13548       1.07772
December        28      2005    199.14839       1.07779
December        29      2005    199.16129       1.07786
December        30      2005    199.17419       1.07793
December        31      2005    199.18710       1.07800