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3-7/8% TREASURY 10-YEAR INFLATION-INDEXED NOTES

Ref CPI and Index Ratios for May 2001

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 2001
NUMBER OF DAYS IN MONTH:                31

CPI-U (NSA) January 2001                175.1
CPI-U (NSA) February 2001               175.8
CPI-U (NSA) March 2001                  176.2

Month   Calendar Day    Year    Ref CPI      Index Ratio

May             1       2001    175.80000       1.07195
May             2       2001    175.81290       1.07203
May             3       2001    175.82581       1.07211
May             4       2001    175.83871       1.07219
May             5       2001    175.85161       1.07227
May             6       2001    175.86452       1.07234
May             7       2001    175.87742       1.07242
May             8       2001    175.89032       1.07250
May             9       2001    175.90323       1.07258
May             10      2001    175.91613       1.07266
May             11      2001    175.92903       1.07274
May             12      2001    175.94194       1.07282
May             13      2001    175.95484       1.07290
May             14      2001    175.96774       1.07297
May             15      2001    175.98065       1.07305
May             16      2001    175.99355       1.07313
May             17      2001    176.00645       1.07321
May             18      2001    176.01935       1.07329
May             19      2001    176.03226       1.07337
May             20      2001    176.04516       1.07345
May             21      2001    176.05806       1.07352
May             22      2001    176.07097       1.07360
May             23      2001    176.08387       1.07368
May             24      2001    176.09677       1.07376
May             25      2001    176.10968       1.07384
May             26      2001    176.12258       1.07392
May             27      2001    176.13548       1.07400
May             28      2001    176.14839       1.07408
May             29      2001    176.16129       1.07415
May             30      2001    176.17419       1.07423
May             31      2001    176.18710       1.07431