My old car had 10-13% depending on what brand meter you used:
http://img.photobucket.com/albums/v226/Schmuckingham/cars/Picture017.jpg
http://img.photobucket.com/albums/v226/Schmuckingham/cars/Pics013.jpg
I got pulled over all the time and it was a PITA, the truck has a little less than legal:
http://img.photobucket.com/albums/v226/Schmuckingham/SVT/Picture029.jpg