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

Ref CPI and Index Ratios for March 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:                     March 2006
NUMBER OF DAYS IN MONTH:                31

CPI-U (NSA) November 2005               197.6
CPI-U (NSA) December 2005               196.8
CPI-U (NSA) January 2006                198.3

Month   Calendar Day    Year    Ref CPI       Index Ratio

March           1       2006    196.80000       1.20000
March           2       2006    196.84839       1.20030
March           3       2006    196.89677       1.20059
March           4       2006    196.94516       1.20089
March           5       2006    196.99355       1.20118
March           6       2006    197.04194       1.20148
March           7       2006    197.09032       1.20177
March           8       2006    197.13871       1.20207
March           9       2006    197.18710       1.20236
March           10      2006    197.23548       1.20266
March           11      2006    197.28387       1.20295
March           12      2006    197.33226       1.20325
March           13      2006    197.38065       1.20354
March           14      2006    197.42903       1.20384
March           15      2006    197.47742       1.20413
March           16      2006    197.52581       1.20443
March           17      2006    197.57419       1.20472
March           18      2006    197.62258       1.20502
March           19      2006    197.67097       1.20531
March           20      2006    197.71935       1.20561
March           21      2006    197.76774       1.20590
March           22      2006    197.81613       1.20620
March           23      2006    197.86452       1.20649
March           24      2006    197.91290       1.20679
March           25      2006    197.96129       1.20708
March           26      2006    198.00968       1.20738
March           27      2006    198.05806       1.20767
March           28      2006    198.10645       1.20797
March           29      2006    198.15484       1.20826
March           30      2006    198.20323       1.20856
March           31      2006    198.25161       1.20885