Just for kicks, today's question is:
What proportion of the world's population would you say celebrates Christmas?
Answer in a couple days.
The answer is... approximately 1/3 of the world's population observes Christmas. (according to the stat given in a show about Christmas technology on the History Channel.)
I was expecting that most guesses would overestimate the number, seeing as when you've been surrounded by it you might tend to do so, as well as the tendency of nationalistic folks to imagine that the world is pretty much like us.
But those who ventured opinions were damn close to correct, and actually underestimated the number, much to my surprise.