xwb: Thanks for your help. I have resolved the problem.
The missing numbers in the table are actually there but you can't see them because the font color is the same as the background color. When the table was created, no font color was specified and IE8 defaulted it to black which you can see. However, IE9 and FireFox default the font to the background color making the numbers disappear. After assigning a font color to the numbers, all browsers are displaying correctly.