And I suspect that if you asked someone who did know how to read, say a member of the clergy, "What percentage of the population do you think is even capable of reading?"
وأظن أنه اذا سألت شخص ما يعرف القراءة، لنقول أنه من رجال الدين، "في اعتقادك ماهي نسبة السكان القادرين على  القراءة؟"