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3-5/8% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for March 2005

Contact: Office of Financing      202-504-3550
DESCRIPTION:                            Series A-2008
CUSIP NUMBER:                           9128273T7
DATED DATE:                             January 15, 1998
ORIGINAL ISSUE DATE:                    January 15, 1998
ADDITIONAL ISSUE DATE:                  October 15, 1998
MATURITY DATE:                          January 15, 2008
Ref CPI on DATED DATE:                  161.55484
TABLE FOR MONTH OF:                     March 2005
NUMBER OF DAYS IN MONTH:                31

CPI-U (NSA) November 2004               191.0
CPI-U (NSA) December 2004               190.3
CPI-U (NSA) January 2005                190.7

Month   Calendar Day    Year    Ref CPI       Index Ratio

March           1       2005    190.30000       1.17793
March           2       2005    190.31290       1.17801
March           3       2005    190.32581       1.17809
March           4       2005    190.33871       1.17817
March           5       2005    190.35161       1.17825
March           6       2005    190.36452       1.17833
March           7       2005    190.37742       1.17841
March           8       2005    190.39032       1.17849
March           9       2005    190.40323       1.17857
March           10      2005    190.41613       1.17865
March           11      2005    190.42903       1.17873
March           12      2005    190.44194       1.17881
March           13      2005    190.45484       1.17889
March           14      2005    190.46774       1.17897
March           15      2005    190.48065       1.17905
March           16      2005    190.49355       1.17913
March           17      2005    190.50645       1.17921
March           18      2005    190.51935       1.17929
March           19      2005    190.53226       1.17937
March           20      2005    190.54516       1.17945
March           21      2005    190.55806       1.17953
March           22      2005    190.57097       1.17961
March           23      2005    190.58387       1.17969
March           24      2005    190.59677       1.17977
March           25      2005    190.60968       1.17985
March           26      2005    190.62258       1.17992
March           27      2005    190.63548       1.18000
March           28      2005    190.64839       1.18008
March           29      2005    190.66129       1.18016
March           30      2005    190.67419       1.18024
March           31      2005    190.68710       1.18032