Germany is the birthplace of Martin Luther and the Protestant
Reformation, but since the middle of the 20th century, the country has
seen a dramatic shift away from Protestantism – one that has greatly
outpaced a decline in the share of Germans who are Catholic. Protestants
represented a majority (59%) of Germany’s population in 1950, with
Catholics as a sizable minority (37%), according to researchers at the
University of Münster in Germany. Over the next 60 years, the share of
Protestants fell 30 percentage points, while the share of Catholics
dropped 7 points. These declines have been accompanied by a rising share
of religiously unaffiliated people.

from Pew Research...

Keyser Soze
Germany is the birthplace of Martin Luther and the Protestant
Reformation, but since the middle of the 20th century, the country has
seen a dramatic shift away from Protestantism – one that has greatly
outpaced a decline in the share of Germans who are Catholic. Protestants
represented a majority (59%) of Germany’s population in 1950, with
Catholics as a sizable minority (37%), according to researchers at the
University of Münster in Germany. Over the next 60 years, the share of
Protestants fell 30 percentage points, while the share of Catholics
dropped 7 points. These declines have been accompanied by a rising share
of religiously unaffiliated people.

from Pew Research...
......
1. They didn’t say how the German population has decreased over the years and 2. How the Muslim population has increased over the years.
From Pew Research...

http://www.pewforum.org/essay/the-gr...im-population/