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3-7/8% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for April 2005

Contact: Office of Financing      202-504-3550
DESCRIPTION:                            Series A-2009
CUSIP NUMBER:                           9128274Y5
DATED DATE:                             January 15, 1999
ORIGINAL ISSUE DATE:                    January 15, 1999
ADDITIONAL ISSUE DATE:                  July 15, 1999
MATURITY DATE:                          January 15, 2009
Ref CPI on DATED DATE:                  164.00000
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       1.16280
April           2       2005    190.73667       1.16303
April           3       2005    190.77333       1.16325
April           4       2005    190.81000       1.16348
April           5       2005    190.84667       1.16370
April           6       2005    190.88333       1.16392
April           7       2005    190.92000       1.16415
April           8       2005    190.95667       1.16437
April           9       2005    190.99333       1.16459
April           10      2005    191.03000       1.16482
April           11      2005    191.06667       1.16504
April           12      2005    191.10333       1.16526
April           13      2005    191.14000       1.16549
April           14      2005    191.17667       1.16571
April           15      2005    191.21333       1.16593
April           16      2005    191.25000       1.16616
April           17      2005    191.28667       1.16638
April           18      2005    191.32333       1.16661
April           19      2005    191.36000       1.16683
April           20      2005    191.39667       1.16705
April           21      2005    191.43333       1.16728
April           22      2005    191.47000       1.16750
April           23      2005    191.50667       1.16772
April           24      2005    191.54333       1.16795
April           25      2005    191.58000       1.16817
April           26      2005    191.61667       1.16839
April           27      2005    191.65333       1.16862
April           28      2005    191.69000       1.16884
April           29      2005    191.72667       1.16907
April           30      2005    191.76333       1.16929