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3-3/8% 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-2007
CUSIP NUMBER:                           9128272M3
DATED DATE:                             January 15, 1997
ORIGINAL ISSUE DATE:                    February 6, 1997
ADDITIONAL ISSUE DATE:                  April 15, 1997
MATURITY DATE:                          January 15, 2007
Ref CPI on DATED DATE:                  158.43548
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       1.25477
December        2       2005    198.81290       1.25485
December        3       2005    198.82581       1.25493
December        4       2005    198.83871       1.25501
December        5       2005    198.85161       1.25510
December        6       2005    198.86452       1.25518
December        7       2005    198.87742       1.25526
December        8       2005    198.89032       1.25534
December        9       2005    198.90323       1.25542
December        10      2005    198.91613       1.25550
December        11      2005    198.92903       1.25558
December        12      2005    198.94194       1.25567
December        13      2005    198.95484       1.25575
December        14      2005    198.96774       1.25583
December        15      2005    198.98065       1.25591
December        16      2005    198.99355       1.25599
December        17      2005    199.00645       1.25607
December        18      2005    199.01935       1.25615
December        19      2005    199.03226       1.25624
December        20      2005    199.04516       1.25632
December        21      2005    199.05806       1.25640
December        22      2005    199.07097       1.25648
December        23      2005    199.08387       1.25656
December        24      2005    199.09677       1.25664
December        25      2005    199.10968       1.25672
December        26      2005    199.12258       1.25681
December        27      2005    199.13548       1.25689
December        28      2005    199.14839       1.25697
December        29      2005    199.16129       1.25705
December        30      2005    199.17419       1.25713
December        31      2005    199.18710       1.25721