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3-3/8% 30-1/2-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for April 2006

Contact: Office of Financing       202-504-3550
DESCRIPTION:                            TIPS of April 2032
CUSIP NUMBER:                           912810FQ6
DATED DATE:                             October 15, 2001
ORIGINAL ISSUE DATE:                    October 15, 2001
ADDITIONAL ISSUE DATE:                  N/A
MATURITY DATE:                          April 15, 2032
Ref CPI on DATED DATE:                  177.50000
TABLE FOR MONTH OF:                     April 2006
NUMBER OF DAYS IN MONTH:                30

CPI-U (NSA) December 2005               196.8
CPI-U (NSA) January 2006                198.3
CPI-U (NSA) February 2006               198.7

Month   Calendar Day    Year    Ref CPI       Index Ratio

April           1       2006    198.30000       1.11718
April           2       2006    198.31333       1.11726
April           3       2006    198.32667       1.11733
April           4       2006    198.34000       1.11741
April           5       2006    198.35333       1.11748
April           6       2006    198.36667       1.11756
April           7       2006    198.38000       1.11763
April           8       2006    198.39333       1.11771
April           9       2006    198.40667       1.11778
April           10      2006    198.42000       1.11786
April           11      2006    198.43333       1.11793
April           12      2006    198.44667       1.11801
April           13      2006    198.46000       1.11808
April           14      2006    198.47333       1.11816
April           15      2006    198.48667       1.11823
April           16      2006    198.50000       1.11831
April           17      2006    198.51333       1.11838
April           18      2006    198.52667       1.11846
April           19      2006    198.54000       1.11854
April           20      2006    198.55333       1.11861
April           21      2006    198.56667       1.11869
April           22      2006    198.58000       1.11876
April           23      2006    198.59333       1.11884
April           24      2006    198.60667       1.11891
April           25      2006    198.62000       1.11899
April           26      2006    198.63333       1.11906
April           27      2006    198.64667       1.11914
April           28      2006    198.66000       1.11921
April           29      2006    198.67333       1.11929
April           30      2006    198.68667       1.11936