This was 2015. prior to the influx
https://www.gatestoneinstitute.org/9892/germany-muslims-demographic
Based on Pew projections, which were proffered before the current migration crisis, the Muslim population of Germany was to have reached an estimated 5,145,000 by the end of 2015.
Adding the 800,000 Muslim migrants who arrived in Germany in 2015, and the 240,000 who arrived in 2016, combined with the 77,000 natural increase, the Muslim population of Germany jumped by 1,117,000, to reach an estimated 6,262,000 by the end of 2016. This amounts to approximately 7.6% of Germany's overall population of 82.8 million.
The Muslim population of Germany could swell to 20 million as early as 2020, according to the president of the Bavarian Association of Municipalities (Bayerische Gemeindetag), Uwe Brandl. His forecast is based on so-called family reunifications — individuals whose asylum applications are approved will subsequently bring between four and eight additional family members to Germany.
