Thanks, Alix. I'm a little surprised at how much action this thread has caused. I was just idly wondering and thought that surely there's someone out there (NOT you, ronjohn) who is into all this number/ratio/percentage stuff and had already figured it all out.
Remember what Mark Twain once said: "There are lies, ****ed lies, and then statisitics."
Kool Aid - Think before you drink.