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3-7/8% 30-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for April 2005

Contact: Office of Financing       202-504-3550
DESCRIPTION:                            TIPS of April 2029
CUSIP NUMBER:                           912810FH6
DATED DATE:                             April 15, 1999
ORIGINAL ISSUE DATE:                    April 15, 1999
ADDITIONAL ISSUE DATE:                  October 15, 1999
                                        October 16, 2000
MATURITY DATE:                          April 15, 2029
Ref CPI on DATED DATE:                  164.39333
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       1.16002
April           2       2005    190.73667       1.16025
April           3       2005    190.77333       1.16047
April           4       2005    190.81000       1.16069
April           5       2005    190.84667       1.16091
April           6       2005    190.88333       1.16114
April           7       2005    190.92000       1.16136
April           8       2005    190.95667       1.16158
April           9       2005    190.99333       1.16181
April           10      2005    191.03000       1.16203
April           11      2005    191.06667       1.16225
April           12      2005    191.10333       1.16248
April           13      2005    191.14000       1.16270
April           14      2005    191.17667       1.16292
April           15      2005    191.21333       1.16315
April           16      2005    191.25000       1.16337
April           17      2005    191.28667       1.16359
April           18      2005    191.32333       1.16381
April           19      2005    191.36000       1.16404
April           20      2005    191.39667       1.16426
April           21      2005    191.43333       1.16448
April           22      2005    191.47000       1.16471
April           23      2005    191.50667       1.16493
April           24      2005    191.54333       1.16515
April           25      2005    191.58000       1.16538
April           26      2005    191.61667       1.16560
April           27      2005    191.65333       1.16582
April           28      2005    191.69000       1.16604
April           29      2005    191.72667       1.16627
April           30      2005    191.76333       1.16649