And by "preferred" you presumably mean "most used". I live in a town that, inexplicably, does not have access to natural gas lines. A lot of people here would

And by "preferred" you presumably mean "most used". I live in a town that, inexplicably, does not have access to natural gas lines. A lot of people here would "prefer" gas stoves but we're stuck with electric. :( But yes, I'd love to see a map like that. Before I moved here I assumed that pretty much everywhere in the developed world had natural gas piping, but evidently not.