From Tom Whipple, in an article about peak oil:
Between 1970 and 2012, the population of the Middle East and North Africa grew from 127 to 569 million. Only some 160 million live in countries that enjoy substantial oil revenues, while the other 400 million live mostly in poverty. The region is adding about 8 million people a year and because of traditional religious and social practices, mostly involved with the lack of empowerment for women, there is no end to rapid growth in sight.
If Whipple’s numbers are correct, the population of this Muslim-dominated region has grown by almost 350% in 42 years.