Andrea, Adherents.com has a statistical chart that is shows the different religions and their numbers.
Can you prove that Erich von Daniken is a conartist? If I ever met one of these guys, I would have thing to ask them. The show tells us about a theory that ancient aliens visited our planet in prehistoric times and gave them technology comparable to today's technology, such as light bulbs and planes. But it doesn't answer the big question, if our ancestors had this technology in prehistoric times, why do we have to redevelop it all? What made us forget this stuff in the first place? But whether you believe it or not, one thing is for sure, the theories presented in the program are probably more viable than the creationist's "theories". :)