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2-3/8% 5-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due April 15, 2011

Ref CPI and Index Ratios for December 2008

    Contact: Office of Financing            202-504-3550
    DESCRIPTION:                            G-2011
    CUSIP NUMBER:                           912828FB1
    DATED DATE:                             April 15, 2006
    ORIGINAL ISSUE DATE:                    April 28, 2006
    ADDITIONAL ISSUE DATE:                  October 31, 2006
    MATURITY DATE:                          April 15, 2011
    Ref CPI on DATED DATE:                  198.48667
    TABLE FOR MONTH OF:                     December 2008
    NUMBER OF DAYS IN MONTH:                31

    CPI-U (NSA) August 2008                 219.086
    CPI-U (NSA) September 2008              218.783
    CPI-U (NSA) October 2008                216.573

    Month   Calendar Day   Year    Ref CPI      Index Ratio

    December       1       2008    218.78300       1.10226
    December       2       2008    218.71171       1.10190
    December       3       2008    218.64042       1.10154
    December       4       2008    218.56913       1.10118
    December       5       2008    218.49784       1.10082
    December       6       2008    218.42655       1.10046
    December       7       2008    218.35526       1.10010
    December       8       2008    218.28397       1.09974
    December       9       2008    218.21268       1.09938
    December       10      2008    218.14139       1.09902
    December       11      2008    218.07010       1.09866
    December       12      2008    217.99881       1.09830
    December       13      2008    217.92752       1.09795
    December       14      2008    217.85623       1.09759
    December       15      2008    217.78494       1.09723
    December       16      2008    217.71365       1.09687
    December       17      2008    217.64235       1.09651
    December       18      2008    217.57106       1.09615
    December       19      2008    217.49977       1.09579
    December       20      2008    217.42848       1.09543
    December       21      2008    217.35719       1.09507
    December       22      2008    217.28590       1.09471
    December       23      2008    217.21461       1.09435
    December       24      2008    217.14332       1.09399
    December       25      2008    217.07203       1.09364
    December       26      2008    217.00074       1.09328
    December       27      2008    216.92945       1.09292
    December       28      2008    216.85816       1.09256
    December       29      2008    216.78687       1.09220
    December       30      2008    216.71558       1.09184
    December       31      2008    216.64429       1.09148