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3-1/2% 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-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:                     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       1.13074
March           2       2006    196.84839       1.13102
March           3       2006    196.89677       1.13130
March           4       2006    196.94516       1.13158
March           5       2006    196.99355       1.13185
March           6       2006    197.04194       1.13213
March           7       2006    197.09032       1.13241
March           8       2006    197.13871       1.13269
March           9       2006    197.18710       1.13297
March           10      2006    197.23548       1.13324
March           11      2006    197.28387       1.13352
March           12      2006    197.33226       1.13380
March           13      2006    197.38065       1.13408
March           14      2006    197.42903       1.13436
March           15      2006    197.47742       1.13463
March           16      2006    197.52581       1.13491
March           17      2006    197.57419       1.13519
March           18      2006    197.62258       1.13547
March           19      2006    197.67097       1.13575
March           20      2006    197.71935       1.13602
March           21      2006    197.76774       1.13630
March           22      2006    197.81613       1.13658
March           23      2006    197.86452       1.13686
March           24      2006    197.91290       1.13714
March           25      2006    197.96129       1.13741
March           26      2006    198.00968       1.13769
March           27      2006    198.05806       1.13797
March           28      2006    198.10645       1.13825
March           29      2006    198.15484       1.13853
March           30      2006    198.20323       1.13880
March           31      2006    198.25161       1.13908