That 3% is like all of what the Lincoln troll says, i.e. BS. Its a ploy enacted by the CIA and driven by godbot lies and deceit to big up the sensibilities of the US god fearing public.<quoted text>
Why waste your hate on 3% of the population by your own confession?
There are more than 9% of the world population who are non believers in any deity in one country alone, China
There are more than 20% of the European population (3.75% of the worlds population) who are non believers in deities
Around 5% of the more than 1 billion Indian population are Hindus who follow the statement of no Lord, the doctrine of godlessness, i.e. atheism and around 8% follow the agnostic flavour of that belief, thats about 4.5% of the worlds population.
The 3%(or 2% or 2.5%, different stories give different numbers) applies to the US only, not the world. And even at that it is a suspect number when you consider the major population centres of NY, LA and SF.
Perhaps the CIA sample surveyed the babble belt and they hypothesised from there.