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3-7/8% 30-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for December 2005

Contact: Office of Financing       202-504-3550
DESCRIPTION:                            TIPS of April 2029
CUSIP NUMBER:                           912810FH6
DATED DATE:                             April 15, 1999
ORIGINAL ISSUE DATE:                    April 15, 1999
ADDITIONAL ISSUE DATE:                  October 15, 1999
                                        October 16, 2000
MATURITY DATE:                          April 15, 2029
Ref CPI on DATED DATE:                  164.39333
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       1.20929
December        2       2005    198.81290       1.20937
December        3       2005    198.82581       1.20945
December        4       2005    198.83871       1.20953
December        5       2005    198.85161       1.20961
December        6       2005    198.86452       1.20969
December        7       2005    198.87742       1.20977
December        8       2005    198.89032       1.20984
December        9       2005    198.90323       1.20992
December        10      2005    198.91613       1.21000
December        11      2005    198.92903       1.21008
December        12      2005    198.94194       1.21016
December        13      2005    198.95484       1.21024
December        14      2005    198.96774       1.21032
December        15      2005    198.98065       1.21039
December        16      2005    198.99355       1.21047
December        17      2005    199.00645       1.21055
December        18      2005    199.01935       1.21063
December        19      2005    199.03226       1.21071
December        20      2005    199.04516       1.21079
December        21      2005    199.05806       1.21086
December        22      2005    199.07097       1.21094
December        23      2005    199.08387       1.21102
December        24      2005    199.09677       1.21110
December        25      2005    199.10968       1.21118
December        26      2005    199.12258       1.21126
December        27      2005    199.13548       1.21134
December        28      2005    199.14839       1.21141
December        29      2005    199.16129       1.21149
December        30      2005    199.17419       1.21157
December        31      2005    199.18710       1.21165