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4-1/4% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due January 15, 2010

Ref CPI and Index Ratios for March 2007

     Contact: Office of Financing            202-504-3550
     DESCRIPTION:                            Series A-2010
     CUSIP NUMBER:                           9128275W8
     DATED DATE:                             January 15, 2000
     ORIGINAL ISSUE DATE:                    January 18, 2000
     ADDITIONAL ISSUE DATE:                  July 17, 2000
     MATURITY DATE:                          January 15, 2010
     Ref CPI on DATED DATE:                  168.24516
     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       1.19944
     March           2       2007    201.81987       1.19956
     March           3       2007    201.83974       1.19968
     March           4       2007    201.85961       1.19979
     March           5       2007    201.87948       1.19991
     March           6       2007    201.89935       1.20003
     March           7       2007    201.91923       1.20015
     March           8       2007    201.93910       1.20027
     March           9       2007    201.95897       1.20039
     March           10      2007    201.97884       1.20050
     March           11      2007    201.99871       1.20062
     March           12      2007    202.01858       1.20074
     March           13      2007    202.03845       1.20086
     March           14      2007    202.05832       1.20098
     March           15      2007    202.07819       1.20109
     March           16      2007    202.09806       1.20121
     March           17      2007    202.11794       1.20133
     March           18      2007    202.13781       1.20145
     March           19      2007    202.15768       1.20157
     March           20      2007    202.17755       1.20168
     March           21      2007    202.19742       1.20180
     March           22      2007    202.21729       1.20192
     March           23      2007    202.23716       1.20204
     March           24      2007    202.25703       1.20216
     March           25      2007    202.27690       1.20227
     March           26      2007    202.29677       1.20239
     March           27      2007    202.31665       1.20251
     March           28      2007    202.33652       1.20263
     March           29      2007    202.35639       1.20275
     March           30      2007    202.37626       1.20287
     March           31      2007    202.39613       1.20298