How many?

Yesterday, I was wondering with a friend how many mathematicians there are on the globe (where we defined a mathematician as someone who has published a mathematical paper over the las ten years, and curiously enough cut ourselves out). Our first estimation was something like 1000000 but I have not been able to find some reliable figures on the net to confirm it. However, I did stumble upon this during my search which really made me laugh hard, although I've heard quite a few mathematical jokes in the past four years.