I wonder what you call &quot;adherents of Islam&quot; and &quot;Muslim population&quot;. As far as I know they are many groups that claim they are Muslims and they sometimes don&#x27;t recognize other groups as Muslims (I have many friends that are Muslim and I am pretty sure they would tell you that the 40% your are mentioning are not Muslims) so I think it would be a bit weird to consider all of them as being &quot;Muslim population&quot; as if they were a single group while there are clearly just separate and unrelated groups that happen to claim the same name.