Almost 95% of the worlds population believe in a god, A Supreme being that created life itself. The other 5% are atheists and scientists. In the future when science can provide more answers, that percentage ratio will change?
Just wanted to say most scientists are atheists. I would bet there are more atheists than simply 5%, especially when you count all the ones still in the closets (especially in the Bible belt in the U.S.). Many European countries, like France, have high atheist populations.
I think as we become more tolerant, more people who are atheists will be able to feel safe coming out with their beliefs. When there is more awareness that atheists are people too, not just people you need to convert, and no, they aren't out to get your children, it's possible more people may see themselves as atheists. There's a lot of pressure in our society to be a "Christian" even if you are non-practicing.
Keep searching, your numbers are wrong.