That runs counter to most of what I've heard. What statistical studies are you citing?
It may have to do with the UP Quark(+2/3 charge)and DOWN Quark(-1/3 charge); but, hey, that's just a guess...Jesus will explain it all when he gets back as our ambassador to intelligent species thruout the universe.
If your statistics are right, a lot of nonChristians go UP Quark.
A careful reading of Scriptures will reveal to you that there are two groups in Heaven, the Bride of Christ and the invited guests; both are there because of what Jesus did for us. Some even if the truth of Him is revealed to them will choose to not accept the Grace of God in Christ. They 'didn't choose wisely', to quote the old Knight in Last Crusade.
Can't remember where I read it(2/3 go UP, 1/3 go DOWN), somewhere... But we christians all remember Jesus saying : he who believes in me, even though he be dead, the same shall I recommend to the father. He also spoke of the "double death" : fear HIM that can both kill and cast into hell, which is the second death. Of course we're getting into theology here, a LARGE subject...Personally I take the more tangible route of rational science as belief alone can be a slippery slope; to wit, far more people have been killed as unbelievers than all the soldiers in all the wars in history. But don't be fooled by those who say science and religion are incompatible roads to TRUTH. A famous philosopher once put it as : x and y axes on the graph. In physics we say : look at it THIS way and you see particle, look at it THAT way and you see wave. So we sometimes say "wavicle"...Again then, we have TWO bodies much like right brain/left brain(child artist proposes the idea, engineer disposes of the idea as impractical)which are different ways of processing the same data-input.