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3-3/8% 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-2007
CUSIP NUMBER:                           9128272M3
DATED DATE:                             January 15, 1997
ORIGINAL ISSUE DATE:                    February 6, 1997
ADDITIONAL ISSUE DATE:                  April 15, 1997
MATURITY DATE:                          January 15, 2007
Ref CPI on DATED DATE:                  158.43548
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       1.24215
March           2       2006    196.84839       1.24245
March           3       2006    196.89677       1.24276
March           4       2006    196.94516       1.24306
March           5       2006    196.99355       1.24337
March           6       2006    197.04194       1.24367
March           7       2006    197.09032       1.24398
March           8       2006    197.13871       1.24428
March           9       2006    197.18710       1.24459
March           10      2006    197.23548       1.24489
March           11      2006    197.28387       1.24520
March           12      2006    197.33226       1.24551
March           13      2006    197.38065       1.24581
March           14      2006    197.42903       1.24612
March           15      2006    197.47742       1.24642
March           16      2006    197.52581       1.24673
March           17      2006    197.57419       1.24703
March           18      2006    197.62258       1.24734
March           19      2006    197.67097       1.24764
March           20      2006    197.71935       1.24795
March           21      2006    197.76774       1.24825
March           22      2006    197.81613       1.24856
March           23      2006    197.86452       1.24886
March           24      2006    197.91290       1.24917
March           25      2006    197.96129       1.24948
March           26      2006    198.00968       1.24978
March           27      2006    198.05806       1.25009
March           28      2006    198.10645       1.25039
March           29      2006    198.15484       1.25070
March           30      2006    198.20323       1.25100
March           31      2006    198.25161       1.25131