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0-7/8% 5-1/2-YEAR TREASURY INFLATION-PROTECTED SECURITIES Due April 15, 2010

Ref CPI and Index Ratios for January 2008

    Contact: Office of Financing            202-504-3550
    DESCRIPTION:                           Series D-2010
    CUSIP NUMBER:                          912828CZ1
    DATED DATE:                            October 15, 2004
    ORIGINAL ISSUE DATE:                   October 29, 2004
    ADDITIONAL ISSUE DATE:                 April 29, 2005
                                           October 28, 2005
    MATURITY DATE:                         April 15, 2010
    Ref CPI on DATED DATE:                 189.44516
    TABLE FOR MONTH OF:                    January 2008
    NUMBER OF DAYS IN MONTH:               31

    CPI-U (NSA) September 2007             208.490
    CPI-U (NSA) October 2007               208.936
    CPI-U (NSA) November 2007              210.177

    Month   Calendar Day    Year    Ref CPI       Index Ratio

    January         1       2008    208.93600       1.10288
    January         2       2008    208.97603       1.10310
    January         3       2008    209.01606       1.10331
    January         4       2008    209.05610       1.10352
    January         5       2008    209.09613       1.10373
    January         6       2008    209.13616       1.10394
    January         7       2008    209.17619       1.10415
    January         8       2008    209.21623       1.10436
    January         9       2008    209.25626       1.10457
    January         10      2008    209.29629       1.10479
    January         11      2008    209.33632       1.10500
    January         12      2008    209.37635       1.10521
    January         13      2008    209.41639       1.10542
    January         14      2008    209.45642       1.10563
    January         15      2008    209.49645       1.10584
    January         16      2008    209.53648       1.10605
    January         17      2008    209.57652       1.10626
    January         18      2008    209.61655       1.10648
    January         19      2008    209.65658       1.10669
    January         20      2008    209.69661       1.10690
    January         21      2008    209.73665       1.10711
    January         22      2008    209.77668       1.10732
    January         23      2008    209.81671       1.10753
    January         24      2008    209.85674       1.10774
    January         25      2008    209.89677       1.10796
    January         26      2008    209.93681       1.10817
    January         27      2008    209.97684       1.10838
    January         28      2008    210.01687       1.10859
    January         29      2008    210.05690       1.10880
    January         30      2008    210.09694       1.10901
    January         31      2008    210.13697       1.10922