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3-3/8% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due January 15, 2012

Ref CPI and Index Ratios for April 2007

     Contact: Office of Financing            202-504-3550
     DESCRIPTION:                            Series A-2012
     CUSIP NUMBER:                           9128277J5
     DATED DATE:                             January 15, 2002
     ORIGINAL ISSUE DATE:                    January 15, 2002
     ADDITIONAL ISSUE DATE:                  N/A
     MATURITY DATE:                          January 15, 2012
     Ref CPI on DATED DATE:                  177.56452
     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       1.13996
     April          2       2007    202.45210       1.14016
     April          3       2007    202.48820       1.14036
     April          4       2007    202.52430       1.14057
     April          5       2007    202.56040       1.14077
     April          6       2007    202.59650       1.14097
     April          7       2007    202.63260       1.14118
     April          8       2007    202.66870       1.14138
     April          9       2007    202.70480       1.14158
     April          10      2007    202.74090       1.14179
     April          11      2007    202.77700       1.14199
     April          12      2007    202.81310       1.14219
     April          13      2007    202.84920       1.14240
     April          14      2007    202.88530       1.14260
     April          15      2007    202.92140       1.14280
     April          16      2007    202.95750       1.14301
     April          17      2007    202.99360       1.14321
     April          18      2007    203.02970       1.14341
     April          19      2007    203.06580       1.14362
     April          20      2007    203.10190       1.14382
     April          21      2007    203.13800       1.14402
     April          22      2007    203.17410       1.14423
     April          23      2007    203.21020       1.14443
     April          24      2007    203.24630       1.14463
     April          25      2007    203.28240       1.14484
     April          26      2007    203.31850       1.14504
     April          27      2007    203.35460       1.14524
     April          28      2007    203.39070       1.14545
     April          29      2007    203.42680       1.14565
     April          30      2007    203.46290       1.14585