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1-5/8% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for May 2005

Contact: Office of Financing       202-504-3550
DESCRIPTION:                            Series A-2015
CUSIP NUMBER:                           912828DH0
DATED DATE:                             January 15, 2005
ORIGINAL ISSUE DATE:                    January 18, 2005
ADDITIONAL ISSUE DATE:                  April 15, 2005
MATURITY DATE:                          January 15, 2015
Ref CPI on DATED DATE:                  190.94516
TABLE FOR MONTH OF:                     May 2005
NUMBER OF DAYS IN MONTH:                31

CPI-U (NSA) January 2005                190.7
CPI-U (NSA) February 2005               191.8
CPI-U (NSA) March 2005                  193.3

Month   Calendar Day    Year    Ref CPI       Index Ratio

May             1       2005    191.80000       1.00448
May             2       2005    191.84839       1.00473
May             3       2005    191.89677       1.00498
May             4       2005    191.94516       1.00524
May             5       2005    191.99355       1.00549
May             6       2005    192.04194       1.00574
May             7       2005    192.09032       1.00600
May             8       2005    192.13871       1.00625
May             9       2005    192.18710       1.00650
May             10      2005    192.23548       1.00676
May             11      2005    192.28387       1.00701
May             12      2005    192.33226       1.00726
May             13      2005    192.38065       1.00752
May             14      2005    192.42903       1.00777
May             15      2005    192.47742       1.00802
May             16      2005    192.52581       1.00828
May             17      2005    192.57419       1.00853
May             18      2005    192.62258       1.00878
May             19      2005    192.67097       1.00904
May             20      2005    192.71935       1.00929
May             21      2005    192.76774       1.00955
May             22      2005    192.81613       1.00980
May             23      2005    192.86452       1.01005
May             24      2005    192.91290       1.01031
May             25      2005    192.96129       1.01056
May             26      2005    193.00968       1.01081
May             27      2005    193.05806       1.01107
May             28      2005    193.10645       1.01132
May             29      2005    193.15484       1.01157
May             30      2005    193.20323       1.01183
May             31      2005    193.25161       1.01208