children per woman. But Muslims have a higher rate, namely, an average of 3.1 children per woman. This differential is one of the reasons that the Muslim population is growing faster than the Christian. Size of youth population. "In 2010, more than a quarter of the world's total population (27%) was under the age of 15." Christian youth under 15 were the same as the 27% global average. But an even higher percentage of Muslims (34%) were younger than 15. This higher youth population is one of the reasons that from 2010-2050 Muslims are projected to grow faster than Christians. Size of old population. In 2010, "11% of the world's population was at least 60 years old", 14% of the Christian population was over 60 years old, but only 7% of Muslims were over 60. This is another reason that Muslims are projected to grow faster than Christians. Switching. A loss of 66 million Christians is projected to come through switching. Most of the loss is projected to come from Christians "joining the ranks of the religiously unaffiliated". The whole Pew Research Center can be read by clicking The Future of World Religions. Africa Christianity has been estimated to be growing rapidly in South America, Africa, and Asia. In Africa, for instance, in 1900, there were only 8.7 million adherents of Christianity; now there are 390 million, and it is expected that by 2025 there will be 600 million Christians in Africa. The number of Catholics in Africa has increased from one million in 1902 to 329,882,000. From 2015 to 2016 alone, Africa saw an increase of 49,767,000 Catholics, a larger increase than any other continent. There are now 1.5 million churches whose congregations account for 46 million people. According to scholar Todd Hartch of Eastern Kentucky University, by 2005, around 6 million Africans converted to Christianity annually. According to scholar R.V. Dmitriev, over 3.3 million African converted to Christianity in 2010. A 2015 study estimates 2,161,000 Muslim Africans that convert to Christianity. Algeria Since 1960 a growing number of Algerian Muslims are converting to Christianity. Converts to Christianity may be investigated and searched by the authorities. Conversions to Christianity have been most common in Kabylie, especially in the wilaya of Tizi-Ouzou. A 2015 study estimates 380,000 Muslims converted to Christianity in Algeria. Benin A 2015 study estimates 40,000 Muslims converted to Christianity in Benin. Burkina Faso A 2015 study