There are numerous ways you could handle this.

Perhaps the simplest approach is to insert a horizontal line, drawn from the left and extending as far right as needed to depict the progress. A more complicated approach would be to change the font format of the cells concerned to Courier New. Coupled with setting the line spacing to single and the cell margins to 0, you could fill each cell with up to 10 block characters created by typing 2588, Alt-x. With this approach, though, you can even colour the individual characters differently.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]