"Ah, Greenland, the least densely populated nation in the world... very useful for making points regarding the United States..."
Well it's interesting you say that, bo. As others have pointed out in responding to putin's points, it is also the least densely populated states in the US that have the highest suicide rates. You're probably onto something a lot more relevant than guns, right there.
But if you don't like Greenland, for the statistical point, then how about South Korea, Russia, Ukraine, Belgium, or France? All have higher suicides than the US.
By the way, now that you've grasped the important differences that population and density can make, may we assume we'll never have to put up with a thread comparing the economies or health care systems of Scandinavia with the US? (Not that I know if you've ever done so).