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1-7/8% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for April 2005

Contact: Office of Financing       202-504-3550
DESCRIPTION:                            Series C-2013
CUSIP NUMBER:                           912828BD1
DATED DATE:                             July 15, 2003
ORIGINAL ISSUE DATE:                    July 15, 2003
ADDITIONAL ISSUE DATE:                  October 15, 2003
MATURITY DATE:                          July 15, 2013
Ref CPI on DATED DATE:                  183.66452
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       1.03831
April           2       2005    190.73667       1.03851
April           3       2005    190.77333       1.03871
April           4       2005    190.81000       1.03891
April           5       2005    190.84667       1.03910
April           6       2005    190.88333       1.03930
April           7       2005    190.92000       1.03950
April           8       2005    190.95667       1.03970
April           9       2005    190.99333       1.03990
April           10      2005    191.03000       1.04010
April           11      2005    191.06667       1.04030
April           12      2005    191.10333       1.04050
April           13      2005    191.14000       1.04070
April           14      2005    191.17667       1.04090
April           15      2005    191.21333       1.04110
April           16      2005    191.25000       1.04130
April           17      2005    191.28667       1.04150
April           18      2005    191.32333       1.04170
April           19      2005    191.36000       1.04190
April           20      2005    191.39667       1.04210
April           21      2005    191.43333       1.04230
April           22      2005    191.47000       1.04250
April           23      2005    191.50667       1.04270
April           24      2005    191.54333       1.04290
April           25      2005    191.58000       1.04310
April           26      2005    191.61667       1.04330
April           27      2005    191.65333       1.04350
April           28      2005    191.69000       1.04370
April           29      2005    191.72667       1.04390
April           30      2005    191.76333       1.04410