Chart data table - word wrap doesn't seem to be occuring
 

In Excel 2003, the data tables that applied to charts would word wrap the
x-axis labels if they were too long. This doesn't seem to be occuring in
Excel 2007. Does anyone know how to fix this? I can't shrink the text too
much because it has to be legible and the chart can only be so big because it
has to fit on a powerpoint slide. Anyone have any ideas?

Thanks!