After to build your Pivot Table, click the down arrow that has the data with
the blanks in it, scroll down to the bottom of the list, and uncheck the box
that says (blank).
As an alternative, you can take a look at this:
http://www.eggheadcafe.com/software/aspnet/30546848/count-blanks-in-pivot-tab.aspx
Regards,
Ryan---
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RyGuy