Interesting survey. All of the previous ones I've seen have indicated precisely the opposite, that men are happier than women.
If accurate, I think that maybe this is because women are typically more involved in the things that ACTUALLY make people happy (e.g. family, friends, religion), whereas men are typically more involved in the things that people THINK make people happy but don't (e.g. money, power, status). Also, men are probably much more likely to abuse drugs and alcohol, which can lead to unhappiness.
Of course it is, if I disagree...lol...
We have 10 times their problems, magnified 100 times by our population.
And I'll bet they have national health care.
I voted, "It's up to the individual," and I totally believe that's true.
I do think that men probably have more of a "chance" to be happy. Here's why: Most guys I know don't think too hard about things. Have an argument or disagreement with a guy? He's likely to take it in stride for what it's worth and go on. He's not likely to stew over it and get mad later. Whatever his reaction is at the time is the one I can count on. Screw up and apologize? He's pretty likely to brush it off, be gracious and forget about it. It's also been my personal experience that guys don't tend to worry like women do. Women are nesters and are, I think, more prone to worrying about the future...the bills...their kids' college...etc. Guys seem to feel more "in control" -- like, "Well, no matter what happens, I'll handle it." Women want more of a plan and tend to "what-if" more than guys. Anxiety can sure take a lot of the joy out of life.
PS -- I know I'm doing a lot of generalizing here, so please don't take me to task. Notice I've couched my views with plenty of qualifiers!!