"According to one 2005 estimate, atheists make up about 2.3% of the world's population" OK, so where is the data that proves that, and who did the one estimate?<quoted text>
Oh ok. LOL
You had 100% of the human population
You now have 2.3% of the human population.
Who's getting their azz kicked?
We had 0% and now have 97.7% of the human population.
Drink the koolaid kid!
That >>> one <<< estimate, you first laud and then try to use it as established fact. Well it don't work that way. It is not established fact.
So let's look again at your own source, wiki ......
"It has been estimated that 16% of the world population (1.1 billion people) are " non-religious" and on the same page "Some evidence suggests that the fastest growing religious status in the United States is "no religion". And it goes on to say that it may be 40 - 50% now.
Mar 20, 2011 ... Nearly two-thirds of people do not regard themselves as "religious", a new survey carried out to coincide with the 2011 Census suggests.
That would be 66%.
www.amazon.com/Good-Without-God-Billion-Nonre... ...-Good Without God: What a Billion Nonreligious People Do Believe [Greg Epstein]
Good Without God: What a Billion Nonreligious People Do ...
and BTW, "drink the koolaid' is all about the sheep following their shepherds instructions from the lord.