12! I think you're on the right track! Keep it up and you have fewer and fewer kills. What'll be funny is when your kidlets start feeling sorry for the scorpions and insist you start catching them for later release!
DANG... I was looking forward to my home cooked Asian meal!
PS - be careful if you kill one that's on the side of your house. Even a rubber mallet will punch a hole in the stucco with a firm strike! My neighbor learned this the hard way!