By complete coincidence I was reviewing Virginia's voting totals from the 2000 Presidential election just about fifteen minutes ago. We averaged about a 2% vote rejection per precinct, with one precinct as high as 10%. Maybe Gore should challenge the vote here as well! LOL
If they threw out 2-10% of the votes in your area, we will never know which candidate "really" got the popular vote. Since the popular vote does not determine the President, the exact figure/answer was not sought. Only states with electoral votes in contention were contested.