Atheists make up only 2% of the world's population. That means the rest of the world believes in some form of religion, maybe even no religion without being atheists.
From wiki, here's the breakdown:
The World Factbook gives the population as 7,095,217,980 (July 2013 est.) and the distribution of religions as Christian 31.50% (of which Roman Catholic 16.85%, Protestant 6.15%, Orthodox 3.96%
Forum:
Recovery Board