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3-1/2% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for June 2006

Contact: Office of Financing      202-504-3550
DESCRIPTION:                            Series A-2011
CUSIP NUMBER:                           9128276R8
DATED DATE:                             January 15, 2001
ORIGINAL ISSUE DATE:                    January 16, 2001
ADDITIONAL ISSUE DATE:                  July 16, 2001
MATURITY DATE:                          January 15, 2011
Ref CPI on DATED DATE:                  174.04516
TABLE FOR MONTH OF:                     June 2006
NUMBER OF DAYS IN MONTH:                30

CPI-U (NSA) February 2006               198.7
CPI-U (NSA) March 2006                  199.8
CPI-U (NSA) April 2006                  201.5

Month   Calendar Day    Year    Ref CPI      Index Ratio

June           1       2006    199.80000       1.14798
June           2       2006    199.85667       1.14830
June           3       2006    199.91333       1.14863
June           4       2006    199.97000       1.14895
June           5       2006    200.02667       1.14928
June           6       2006    200.08333       1.14961
June           7       2006    200.14000       1.14993
June           8       2006    200.19667       1.15026
June           9       2006    200.25333       1.15058
June           10      2006    200.31000       1.15091
June           11      2006    200.36667       1.15123
June           12      2006    200.42333       1.15156
June           13      2006    200.48000       1.15188
June           14      2006    200.53667       1.15221
June           15      2006    200.59333       1.15254
June           16      2006    200.65000       1.15286
June           17      2006    200.70667       1.15319
June           18      2006    200.76333       1.15351
June           19      2006    200.82000       1.15384
June           20      2006    200.87667       1.15416
June           21      2006    200.93333       1.15449
June           22      2006    200.99000       1.15482
June           23      2006    201.04667       1.15514
June           24      2006    201.10333       1.15547
June           25      2006    201.16000       1.15579
June           26      2006    201.21667       1.15612
June           27      2006    201.27333       1.15644
June           28      2006    201.33000       1.15677
June           29      2006    201.38667       1.15709
June           30      2006    201.44333       1.15742