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2% 20-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS)

Ref CPI and Index Ratios for March 2006

Contact: Office of Financing       202-504-3550
DESCRIPTION:                            TIPS of January 2026
CUSIP NUMBER:                           912810FS2
DATED DATE:                             January 15, 2006
ORIGINAL ISSUE DATE:                    January 31, 2006
ADDITIONAL ISSUE DATE:                  N/A
MATURITY DATE:                          January 15, 2026
Ref CPI on DATED DATE:                  198.47742
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       0.99155
March           2       2006    196.84839       0.99179
March           3       2006    196.89677       0.99204
March           4       2006    196.94516       0.99228
March           5       2006    196.99355       0.99252
March           6       2006    197.04194       0.99277
March           7       2006    197.09032       0.99301
March           8       2006    197.13871       0.99326
March           9       2006    197.18710       0.99350
March           10      2006    197.23548       0.99374
March           11      2006    197.28387       0.99399
March           12      2006    197.33226       0.99423
March           13      2006    197.38065       0.99447
March           14      2006    197.42903       0.99472
March           15      2006    197.47742       0.99496
March           16      2006    197.52581       0.99521
March           17      2006    197.57419       0.99545
March           18      2006    197.62258       0.99569
March           19      2006    197.67097       0.99594
March           20      2006    197.71935       0.99618
March           21      2006    197.76774       0.99642
March           22      2006    197.81613       0.99667
March           23      2006    197.86452       0.99691
March           24      2006    197.91290       0.99716
March           25      2006    197.96129       0.99740
March           26      2006    198.00968       0.99764
March           27      2006    198.05806       0.99789
March           28      2006    198.10645       0.99813
March           29      2006    198.15484       0.99837
March           30      2006    198.20323       0.99862
March           31      2006    198.25161       0.99886