Even these stats are misleading - exclude the single-vote populations of India and US, and the percentage of world's remaining population subjugated by totalitarian governments would be more than 50%!
No group has claim to being a moral authority, because ALL moral judgement comes from within individuals.
Knowing right from wrong is a complex matter that is within the power of thinking individuals to comprehend on their own, but good moral teaching does speed the process in helping to prevent moral, learning curve, accidents.
Religions such as Christianity, Judaism and Islam claim moral authority within their creeds; but no one can rationally claim that any religion is morally infallible.
That leaves the matter up to the individual, and the importance of good moral training in childhood becomes all the more obviously important.
Unfortunately, American kids are receiving little to nothing in worthwhile moral training from public schools.
At the very least, kids should be taught the non-denominational ethics of eudaemonism -- Airistotle's ethics.