No, I accept the conclusion for what it is, I was simply pointing out that the US has a far larger population than the other countries and nothing about it is addressed in the study. I'll take any study for face value, but it does not mean I will not question it. As I have just seen this in between classes and have not had time to look up any more on the subject, I figured I would just point it out and see if anybody else had any insight to it while I went back to class. I wasn't about to make any inferences about its effects at this time because if I did, I would simply be talking out my ass. I am not rejecting the study though, just asking a question.