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3-5/8% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for July 2005

Contact: Office of Financing      202-504-3550
DESCRIPTION:                            Series A-2008
CUSIP NUMBER:                           9128273T7
DATED DATE:                             January 15, 1998
ORIGINAL ISSUE DATE:                    January 15, 1998
ADDITIONAL ISSUE DATE:                  October 15, 1998
MATURITY DATE:                          January 15, 2008
Ref CPI on DATED DATE:                  161.55484
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       1.20454
July            2       2005    194.59355       1.20450
July            3       2005    194.58710       1.20446
July            4       2005    194.58065       1.20442
July            5       2005    194.57419       1.20438
July            6       2005    194.56774       1.20434
July            7       2005    194.56129       1.20430
July            8       2005    194.55484       1.20427
July            9       2005    194.54839       1.20423
July            10      2005    194.54194       1.20419
July            11      2005    194.53548       1.20415
July            12      2005    194.52903       1.20411
July            13      2005    194.52258       1.20407
July            14      2005    194.51613       1.20403
July            15      2005    194.50968       1.20399
July            16      2005    194.50323       1.20395
July            17      2005    194.49677       1.20391
July            18      2005    194.49032       1.20387
July            19      2005    194.48387       1.20383
July            20      2005    194.47742       1.20379
July            21      2005    194.47097       1.20375
July            22      2005    194.46452       1.20371
July            23      2005    194.45806       1.20367
July            24      2005    194.45161       1.20363
July            25      2005    194.44516       1.20359
July            26      2005    194.43871       1.20355
July            27      2005    194.43226       1.20351
July            28      2005    194.42581       1.20347
July            29      2005    194.41935       1.20343
July            30      2005    194.41290       1.20339
July            31      2005    194.40645       1.20335