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3-5/8% 30-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for July 2005

Contact: Office of Financing       202-504-3550
DESCRIPTION:                            TIPS of April 2028
CUSIP NUMBER:                           912810FD5
DATED DATE:                             April 15, 1998
ORIGINAL ISSUE DATE:                    April 15, 1998
ADDITIONAL ISSUE DATE:                  July 15, 1998
MATURITY DATE:                          April 15, 2028
Ref CPI on DATED DATE:                  161.74000
TABLE FOR MONTH OF:                     July 2005
NUMBER OF DAYS IN MONTH:                31

CPI-U (NSA) March 2005                  193.3
CPI-U (NSA) April 2005                  194.6
CPI-U (NSA) May 2005                    194.4

Month   Calendar Day    Year    Ref CPI       Index Ratio

July            1       2005    194.60000       1.20317
July            2       2005    194.59355       1.20313
July            3       2005    194.58710       1.20309
July            4       2005    194.58065       1.20305
July            5       2005    194.57419       1.20301
July            6       2005    194.56774       1.20297
July            7       2005    194.56129       1.20293
July            8       2005    194.55484       1.20289
July            9       2005    194.54839       1.20285
July            10      2005    194.54194       1.20281
July            11      2005    194.53548       1.20277
July            12      2005    194.52903       1.20273
July            13      2005    194.52258       1.20269
July            14      2005    194.51613       1.20265
July            15      2005    194.50968       1.20261
July            16      2005    194.50323       1.20257
July            17      2005    194.49677       1.20253
July            18      2005    194.49032       1.20249
July            19      2005    194.48387       1.20245
July            20      2005    194.47742       1.20241
July            21      2005    194.47097       1.20237
July            22      2005    194.46452       1.20233
July            23      2005    194.45806       1.20229
July            24      2005    194.45161       1.20225
July            25      2005    194.44516       1.20221
July            26      2005    194.43871       1.20217
July            27      2005    194.43226       1.20213
July            28      2005    194.42581       1.20209
July            29      2005    194.41935       1.20205
July            30      2005    194.41290       1.20201
July            31      2005    194.40645       1.20197