The Pew Research Center estimates that the U.S. Muslim population is growing at the rate of about 100,000 per year. According to the center, the number of Number of Muslims legally residing in the U.S. grew from 3.31 million in 2016 to 3.45 million in 2017. Muslim advocacy groups, such as the Council on American-Islamic Relations, maintain that the total of Muslims is significantly higher, between 6 and 8 million. There is general agreement on the reasons why the Muslim population is growing: immigration and a high Muslim birth rate.
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