Americans!

Overweight is a hard thing to judge. Do you count people who are a little on the plump side like myself, but who aren't actually "out of control" of their eating and weight? Or just the obese people?

There is a flawed way of judging over/under weight that is generally used when doing these studies.

http://www.nhlbisupport.com/bmi/

Just a simple input of height and weight and you wind up with a number you can reference to determine where you are at.