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3-1/2% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due January 15, 2011

Ref CPI and Index Ratios for March 2007

    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:                     March 2007
    NUMBER OF DAYS IN MONTH:                31

    CPI-U (NSA) November 2006               201.5
    CPI-U (NSA) December 2006               201.8
    CPI-U (NSA) January 2007                202.416

    Month    Calendar Day   Year    Ref CPI       Index Ratio

    March           1       2007    201.80000       1.15947
    March           2       2007    201.81987       1.15958
    March           3       2007    201.83974       1.15970
    March           4       2007    201.85961       1.15981
    March           5       2007    201.87948       1.15993
    March           6       2007    201.89935       1.16004
    March           7       2007    201.91923       1.16015
    March           8       2007    201.93910       1.16027
    March           9       2007    201.95897       1.16038
    March           10      2007    201.97884       1.16050
    March           11      2007    201.99871       1.16061
    March           12      2007    202.01858       1.16073
    March           13      2007    202.03845       1.16084
    March           14      2007    202.05832       1.16095
    March           15      2007    202.07819       1.16107
    March           16      2007    202.09806       1.16118
    March           17      2007    202.11794       1.16130
    March           18      2007    202.13781       1.16141
    March           19      2007    202.15768       1.16152
    March           20      2007    202.17755       1.16164
    March           21      2007    202.19742       1.16175
    March           22      2007    202.21729       1.16187
    March           23      2007    202.23716       1.16198
    March           24      2007    202.25703       1.16210
    March           25      2007    202.27690       1.16221
    March           26      2007    202.29677       1.16232
    March           27      2007    202.31665       1.16244
    March           28      2007    202.33652       1.16255
    March           29      2007    202.35639       1.16267
    March           30      2007    202.37626       1.16278
    March           31      2007    202.39613       1.16289