Europes Muslim population will continue to grow over the next several decades even if all immigration to the continent should stop, according to a study published Thursday.
The Pew Research Center report modeled three scenarios for estimating the number of Muslims who would be living in Europe by 2050. All three used a mid-2016 estimate of 25.8 million as a baseline, but assumed different future migration rates.
Under the zero migration scenario, an estimated 30 million Muslims would make up 7.4 percent of Europes population by 2050 compared to the 4.9 percent they comprised last year, the report projected. The researchers said that is mostly because Muslims are on average 13 years younger than other Europeans and also have a higher birthrate, the Pew researchers said.
The study estimates 58.8 million Muslims would account for 11.2 percent of the population in a medium migration scenario that has migration maintaining a regular speed — defined by the Pew researchers as migration motivated by economic, educational and family reasons — but not for seeking asylum as a refugee.
In the high migration scenario, the study projects that the record flow of migrants who came to Europe between 2015 and 2016 would continue indefinitely, resulting in 75 million Muslims in Europe, a 14 percent increase, by the middle of the century.
Even with the most immigration, Muslims would still be considerably smaller than the populations of both Christians and people with no religion in Europe, the researchers concluded.
Muslim immigrants have been a politically sensitive topic in Europe following the influx of newcomers in 2015 and 2016. Some countries have seen backlashes that have included populist parties campaigning on anti-Islam messages.
The study was based on census and survey data, population registers, immigration data and other sources. The 30 countries it covered include the 28 European Union members, plus Norway and Switzerland.
Not all countries would be affected evenly by future immigration, according to the Pew report. In the high migration scenario, Germany and Sweden would have the biggest increases because both countries took in the most asylum-seekers during the height of the refugee crisis two years ago.
While Muslims made up 6 percent of Germanys population last year, their proportion would go up to 20 percent by 2050. Swedens Muslims, who were at 8 percent in 2016, would account for 31 percent of the population in that same scenario.
Meanwhile, some countries that had comparatively few Muslim residents in 2016 would continue to have few by 2050 in all three scenarios.
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