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3-7/8% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due January 15, 2009

Ref CPI and Index Ratios for March 2008

   Contact: Office of Financing            202-504-3550
   DESCRIPTION:                            Series A-2009
   CUSIP NUMBER:                           9128274Y5
   DATED DATE:                             January 15, 1999
   ORIGINAL ISSUE DATE:                    January 15, 1999
   ADDITIONAL ISSUE DATE:                  July 15, 1999
   MATURITY DATE:                          January 15, 2009
   Ref CPI on DATED DATE:                  164.00000
   TABLE FOR MONTH OF:                     March 2008
   NUMBER OF DAYS IN MONTH:                31

   CPI-U (NSA) November 2007               210.177
   CPI-U (NSA) December 2007               210.036
   CPI-U (NSA) January 2008                211.080

   Month   Calendar Day    Year    Ref CPI       Index Ratio

   March           1       2008    210.03600       1.28071
   March           2       2008    210.06968       1.28091
   March           3       2008    210.10335       1.28112
   March           4       2008    210.13703       1.28132
   March           5       2008    210.17071       1.28153
   March           6       2008    210.20439       1.28173
   March           7       2008    210.23806       1.28194
   March           8       2008    210.27174       1.28214
   March           9       2008    210.30542       1.28235
   March           10      2008    210.33910       1.28256
   March           11      2008    210.37277       1.28276
   March           12      2008    210.40645       1.28297
   March           13      2008    210.44013       1.28317
   March           14      2008    210.47381       1.28338
   March           15      2008    210.50748       1.28358
   March           16      2008    210.54116       1.28379
   March           17      2008    210.57484       1.28399
   March           18      2008    210.60852       1.28420
   March           19      2008    210.64219       1.28440
   March           20      2008    210.67587       1.28461
   March           21      2008    210.70955       1.28481
   March           22      2008    210.74323       1.28502
   March           23      2008    210.77690       1.28523
   March           24      2008    210.81058       1.28543
   March           25      2008    210.84426       1.28564
   March           26      2008    210.87794       1.28584
   March           27      2008    210.91161       1.28605
   March           28      2008    210.94529       1.28625
   March           29      2008    210.97897       1.28646
   March           30      2008    211.01265       1.28666
   March           31      2008    211.04632       1.28687