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3-7/8% 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-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:                     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       1.21829
June            2       2006    199.85667       1.21864
June            3       2006    199.91333       1.21898
June            4       2006    199.97000       1.21933
June            5       2006    200.02667       1.21967
June            6       2006    200.08333       1.22002
June            7       2006    200.14000       1.22037
June            8       2006    200.19667       1.22071
June            9       2006    200.25333       1.22106
June            10      2006    200.31000       1.22140
June            11      2006    200.36667       1.22175
June            12      2006    200.42333       1.22209
June            13      2006    200.48000       1.22244
June            14      2006    200.53667       1.22278
June            15      2006    200.59333       1.22313
June            16      2006    200.65000       1.22348
June            17      2006    200.70667       1.22382
June            18      2006    200.76333       1.22417
June            19      2006    200.82000       1.22451
June            20      2006    200.87667       1.22486
June            21      2006    200.93333       1.22520
June            22      2006    200.99000       1.22555
June            23      2006    201.04667       1.22589
June            24      2006    201.10333       1.22624
June            25      2006    201.16000       1.22659
June            26      2006    201.21667       1.22693
June            27      2006    201.27333       1.22728
June            28      2006    201.33000       1.22762
June            29      2006    201.38667       1.22797
June            30      2006    201.44333       1.22831