I've never utilized pivot tables/charts. Although I have played with some, not familiar with all their quirks. If you want to provide db for analysis, follow instructions at bottom of my post.
Be aware that MS has removed pivot objects from Access 2013.
How to attach file: http://www.accessforums.net/showthread.php?t=70301 To provide db: copy, remove confidential data, run compact & repair, zip w/Windows Compression.