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

Ref CPI and Index Ratios for April 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:                  N/A
MATURITY DATE:                          January 15, 2015
Ref CPI on DATED DATE:                  190.94516
TABLE FOR MONTH OF:                     April 2005
NUMBER OF DAYS IN MONTH:                30

CPI-U (NSA) December 2004               190.3
CPI-U (NSA) January 2005                190.7
CPI-U (NSA) February 2005               191.8

Month   Calendar Day    Year    Ref CPI       Index Ratio

April           1       2005    190.70000       0.99872
April           2       2005    190.73667       0.99891
April           3       2005    190.77333       0.99910
April           4       2005    190.81000       0.99929
April           5       2005    190.84667       0.99948
April           6       2005    190.88333       0.99968
April           7       2005    190.92000       0.99987
April           8       2005    190.95667       1.00006
April           9       2005    190.99333       1.00025
April           10      2005    191.03000       1.00044
April           11      2005    191.06667       1.00064
April           12      2005    191.10333       1.00083
April           13      2005    191.14000       1.00102
April           14      2005    191.17667       1.00121
April           15      2005    191.21333       1.00140
April           16      2005    191.25000       1.00160
April           17      2005    191.28667       1.00179
April           18      2005    191.32333       1.00198
April           19      2005    191.36000       1.00217
April           20      2005    191.39667       1.00236
April           21      2005    191.43333       1.00256
April           22      2005    191.47000       1.00275
April           23      2005    191.50667       1.00294
April           24      2005    191.54333       1.00313
April           25      2005    191.58000       1.00332
April           26      2005    191.61667       1.00352
April           27      2005    191.65333       1.00371
April           28      2005    191.69000       1.00390
April           29      2005    191.72667       1.00409
April           30      2005    191.76333       1.00428