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

Ref CPI and Index Ratios for April 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:                     April 2007
     NUMBER OF DAYS IN MONTH:                30

     CPI-U (NSA) December 2006               201.8
     CPI-U (NSA) January 2007                202.416
     CPI-U (NSA) February 2007               203.499

     Month   Calendar Day   Year    Ref CPI       Index Ratio

     April          1       2007    202.41600       1.20310
     April          2       2007    202.45210       1.20332
     April          3       2007    202.48820       1.20353
     April          4       2007    202.52430       1.20375
     April          5       2007    202.56040       1.20396
     April          6       2007    202.59650       1.20417
     April          7       2007    202.63260       1.20439
     April          8       2007    202.66870       1.20460
     April          9       2007    202.70480       1.20482
     April          10      2007    202.74090       1.20503
     April          11      2007    202.77700       1.20525
     April          12      2007    202.81310       1.20546
     April          13      2007    202.84920       1.20568
     April          14      2007    202.88530       1.20589
     April          15      2007    202.92140       1.20611
     April          16      2007    202.95750       1.20632
     April          17      2007    202.99360       1.20653
     April          18      2007    203.02970       1.20675
     April          19      2007    203.06580       1.20696
     April          20      2007    203.10190       1.20718
     April          21      2007    203.13800       1.20739
     April          22      2007    203.17410       1.20761
     April          23      2007    203.21020       1.20782
     April          24      2007    203.24630       1.20804
     April          25      2007    203.28240       1.20825
     April          26      2007    203.31850       1.20847
     April          27      2007    203.35460       1.20868
     April          28      2007    203.39070       1.20889
     April          29      2007    203.42680       1.20911
     April          30      2007    203.46290       1.20932