Muslim population growth
Muslim population growth is the population growth of Muslims worldwide. In 2006, countries with a Muslim majority population growth rate of 1.8% per year (when weighted by percentage Muslim and population size). This compares with a world population growth rate of 1.1% per year. As of 2011, it was predicted that the world's Muslim population will grow twice as fast as non-Muslims over the next 20 years. fertility rate, (median age of 24) compared to other religious groups.
"This significant growth has great numbers of conversions and widespread following. According to Pew Research, religious conversion has no net impact on the Muslim population as the number of people who convert to Islam is roughly similar to those who leave Islam.  A 2007 Center for Strategic and International Studies report argued that some Muslim population projections are overestimated, as they assume that all descendants of Muslims will become Muslims even in cases of mixed parenthood.
- According to the Carnegie Endowment for International Peace, the World Christian Database as of 2007 estimated the six fastest-growing religions of the world to be Islam (1.8%), the Bahá'í Faith (1.7%), Sikhism (1.6%), Jainism (1.6%), Hinduism (1.5%), and Christianity (1.3%). High birth rates were cited as the reason for the growth. Conversion is not significant in Islam's population change.
- Monsignor Vittorio Formenti, who compiles the Vatican's yearbook, said in an interview with the Vatican newspaper L'Osservatore Romano that "For the first time in history, we are no longer at the top: Muslims have overtaken us". He said that Catholics accounted for 17.4% of the world population—a stable percentage—while Muslims were at 19.2%. "It is true that while Muslim families, as is well known, continue to make a lot of children, Christian ones on the contrary tend to have fewer and fewer," the monsignor said.
- On April 2, 2015, the Pew Research Center published a demographic study about "The Future of World Religions: Population Growth Projections, 2010-2050" with projections of the growth of Islam and reasons why "Islam will grow faster than any other major religion." The study concluded that the global Muslim population is expected to grow at a faster rate than the non-Muslim population due primarily to the young age and high fertility rate of Muslims.
- Projected growth of Islam by 2050
- Some of the projections are as follows:
- "If current trends continue, by 2050 the number of Muslims will nearly equal the number of Christians around the world."
- "In Europe, Muslims will make up 10% of the overall population."
- In India, a Hindu majority will be retained, but India will also "have the largest Muslim population of any country in the world, surpassing Indonesia" which in 2015 has the largest Muslim population.
- "In the United States, "Muslims will be more numerous in the U.S. than people who identify as Jewish on the basis of religion," so "Judaism will no longer be the largest non-Christian religion."
- Reasons given for the projected growth
- Some of the reasons the study gave are as follows:
- The change in the world's religious is "driven primarily by differences in fertility rates and the size of youth populations among the world's major religions, as well as by people switching faiths."
- Fertility rates. The world's total population "is expected to rise to 9.3 billion, a 35% increase" between 2010 and 2050, However, "over that same period, Muslims, who have a comparatively youthful population with high fertility rates, are projected to increase by 73%." Muslim growth benefits from the fertility factor because "globally, Muslims have the highest fertility rate, an average of 3.1 children per woman." This is above a replacement level of 2.1 which is "the minimum typically needed to maintain a stable population."
- Size of youth population. "In 2010, more than a quarter of the world's total population (27%) was under the age of 15. But a "higher percentage of Muslims (34%) were younger than 15."
- Size of old population. In 2010, "11% of the world's population was at least 60 years old," but only 7% of Muslims were over 60.
- Switching. Between 2010 and 2050 a gain of 3,220,000 Muslim adherents is projected to come through switching, mostly found in the Sub Saharan Africa (2.9 million). Also, the Muslim population are projected to add 1.3 million and lose 880,000 via switching, for a net gain of 420,000 between 2015 and 2020.
- Migration. Migration is the third reason for the Muslim population growth. For example, 1.8% of the projected growth in Europe is attributed to Muslims migrating in.
Islam is currently the largest religion in Asia. According to the Pew Research Center, nearly three-in-ten people living in the Asia-Pacific region in 2030 (27.3%) will be Muslim, up from about a quarter in 2010 (24.8%) and roughly a fifth in 1990 (21.6%).
Islam is the fastest-growing religion in India. Growth rate of Muslims has been consistently higher than the growth rate of Hindus, even since the census data of independent India has been available. For example, during the 1991-2001 decade, Muslim growth rate was 29.52% (vs 19.92% for Hindus) However, Muslims population growth rate declined to 24.6% during 2001-2011 decade, in keeping with the similar decline in most religious groups of India.
In India regarding attitudes "toward birth control," younger (ages 10–19) Muslim women are less likely to favor it than are older (ages 20–30). Regarding "knowledge of birth control," younger (ages 10–19) Muslim women know less than do older (ages 20–30). "Muslim marriages take place earlier" than other religions, and younger (ages 10–19) Muslim women are more likely to want to have "many children" than are older (ages 20–30).
According to Paul Kurtz, Muslims in India are much more resistant to modern contraceptive measures compared to other Indians and, as a consequence, the fertility rate among non-Muslim women is much lower compared to that of Muslim women. According to the projection of a 2006 committee appointed by the Indian Prime Minister Manmohan Singh, if the current trend continued, by the end of the 21st century India's Muslim population would reach about 340 million people (19% or 20% of India's total projected population), despite the fact that Hindus would still remain the predominant religious community of the country. Islam is the second-largest religion in India, making up 14.2% of the country's population with about 172 million adherents (2011 census). In 2017, India had the third largest population of Muslims, after Indonesia and Pakistan.
In China, Muslim population growth has been estimated to be as much as 2.7% from 1964–1982, however the Pew Research Center projects a slowing down of Muslim population growth in China due partly to the fact that many Hui Muslims voluntarily limit themselves to one child in China, a response to their Imams expressing the benefits of population control.  By contrast, China's Christian population growth has been estimated at 4.7% based on total population figures from the year 1949.  The number of permitted births in China varies between one and three children depending on geographic area. Chinese family planning policy allows minorities, including Muslims, to have up to two children in urban areas, and three to four children in rural areas.
Islam is the fastest-growing religion in Europe. According to the Pew Research Center, the Muslim population in Europe (excluding Turkey) was about 30 million in 1990, 44 million in 2010 and is expected to increase to 58 million by 2030; the Muslim share of the population increased from 4.1% in 1990 to 6% in 2010 and is expected to reach 8% in 2030. There were approximately 19 million Muslims in the European Union in 2010 or about (3.8%).
Data for the rates of growth of Islam in Europe reveal that the growing number of Muslims is due primarily to immigration and higher birth rates. Eric Kaufman of University of London argue that the main reason why Islam is expanding, is not because of conversion to Islam, but primarily to the nature of the religion as he call it “pro-natal”, where Muslims tend to have more children. Muslim women today have an average of 2.2 children compared to an estimated average of 1.5 children for non-Muslim women in Europe. While the birth rate for Muslims in Europe is expected to decline over the next two decades, it will remain slightly higher than in the non-Muslim population, except for Dutch-Turks, who have a lower birthrate (1.7) than the native Dutch population (1.8).
In France there are an estimated 100,000 Muslim converts, compared with about 50,000 in 1986.
The following table lists historical growth rates (rounded) by schools and branches in Islam as published by the previous two editions of the World Christian Encyclopedia.
|Branches/Schools||Growth rate (%) in 1982||Growth rate (%) in 2001|
In a 2015 article, the Pew Research Center said that the "bulging youth populations are among the reasons that Muslims are projected to grow faster than the world's overall population". Only 0.3% (3,220,000 people) of the expected Muslim population growth (1,161,780,000) in the period of 2010–2050 would be due to conversions; 99.7% would be due to a high birth rate among Muslims. Another Pew Research Center study in 2017 projected that only 0.3% (500,000 people) of the Muslim population growth in the period of 2010–2015 will be due to conversions, while 99.7% (152,000,000) will be due natural increase (births minus deaths). According to The New York Times, an estimated 25% of American Muslims are converts. In Britain, around 6,000 people convert to Islam per year and according to a June 2000 article in the British Muslims Monthly Survey the bulk of new Muslim converts in Britain were women. According to The Huffington Post, "observers estimate that as many as 20,000 Americans convert to Islam annually."
According to Pew Research, the number of U.S. converts to Islam is roughly equal to the number of U.S. Muslims who leave the religion. 77% of new converts to Islam are from Christianity, whereas 19% were from non-religion. Whereas, 55% of Muslims who left Islam went to non-religion, and 22% converted to Christianity.
Darren E. Sherkat questioned in Foreign Affairs whether some of the Muslim growth projections are accurate as they do not take into account the increasing number of non-religious Muslims. Quantitative research is lacking, but he believes the European trend mirrors the American: data from the General Social Survey in the United States show that 32 percent of those raised Muslim no longer embrace Islam in adulthood, and 18 percent hold no religious identification.
Studies estimate significantly more people have converted from Islam to Christianity in the 21st century than at any other point in Islamic history. A 2015 study found that up to 10.2 million Muslim converted to Christianity. The increasingly large ex-Muslim communities in the Western world that adhere to no religion have also been well documented.
- Averaging of individual country figures from CIA factbook see also Demographics of Islam
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