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4-1/4% 10-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due January 15, 2010

Ref CPI and Index Ratios for January 2008

     Contact: Office of Financing            202-504-3550
     DESCRIPTION:                            Series A-2010
     CUSIP NUMBER:                           9128275W8
     DATED DATE:                             January 15, 2000
     ORIGINAL ISSUE DATE:                    January 18, 2000
     ADDITIONAL ISSUE DATE:                  July 17, 2000
     MATURITY DATE:                          January 15, 2010
     Ref CPI on DATED DATE:                  168.24516
     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       1.24185
     January         2       2008    208.97603       1.24209
     January         3       2008    209.01606       1.24233
     January         4       2008    209.05610       1.24257
     January         5       2008    209.09613       1.24281
     January         6       2008    209.13616       1.24304
     January         7       2008    209.17619       1.24328
     January         8       2008    209.21623       1.24352
     January         9       2008    209.25626       1.24376
     January         10      2008    209.29629       1.24400
     January         11      2008    209.33632       1.24423
     January         12      2008    209.37635       1.24447
     January         13      2008    209.41639       1.24471
     January         14      2008    209.45642       1.24495
     January         15      2008    209.49645       1.24519
     January         16      2008    209.53648       1.24542
     January         17      2008    209.57652       1.24566
     January         18      2008    209.61655       1.24590
     January         19      2008    209.65658       1.24614
     January         20      2008    209.69661       1.24638
     January         21      2008    209.73665       1.24661
     January         22      2008    209.77668       1.24685
     January         23      2008    209.81671       1.24709
     January         24      2008    209.85674       1.24733
     January         25      2008    209.89677       1.24756
     January         26      2008    209.93681       1.24780
     January         27      2008    209.97684       1.24804
     January         28      2008    210.01687       1.24828
     January         29      2008    210.05690       1.24852
     January         30      2008    210.09694       1.24875
     January         31      2008    210.13697       1.24899