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

Ref CPI and Index Ratios for May 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:                     May 2005
NUMBER OF DAYS IN MONTH:                31

CPI-U (NSA) January 2005                190.7
CPI-U (NSA) February 2005               191.8
CPI-U (NSA) March 2005                  193.3

Month   Calendar Day    Year    Ref CPI       Index Ratio

May             1       2005    191.80000       1.16951
May             2       2005    191.84839       1.16981
May             3       2005    191.89677       1.17010
May             4       2005    191.94516       1.17040
May             5       2005    191.99355       1.17069
May             6       2005    192.04194       1.17099
May             7       2005    192.09032       1.17128
May             8       2005    192.13871       1.17158
May             9       2005    192.18710       1.17187
May             10      2005    192.23548       1.17217
May             11      2005    192.28387       1.17246
May             12      2005    192.33226       1.17276
May             13      2005    192.38065       1.17305
May             14      2005    192.42903       1.17335
May             15      2005    192.47742       1.17364
May             16      2005    192.52581       1.17394
May             17      2005    192.57419       1.17423
May             18      2005    192.62258       1.17453
May             19      2005    192.67097       1.17482
May             20      2005    192.71935       1.17512
May             21      2005    192.76774       1.17541
May             22      2005    192.81613       1.17571
May             23      2005    192.86452       1.17600
May             24      2005    192.91290       1.17630
May             25      2005    192.96129       1.17659
May             26      2005    193.00968       1.17689
May             27      2005    193.05806       1.17718
May             28      2005    193.10645       1.17748
May             29      2005    193.15484       1.17777
May             30      2005    193.20323       1.17807
May             31      2005    193.25161       1.17836