Since we can presume that the population of Turks in Germany has increased, that means that the population of native Germans has probably shrunk even more than this article indicates.
Guenter Glass wrote a book about thirty years ago predicting the demise of the German race about 2050. Looking around at the Germans I knew, I realized for the first time that he was right. They used to have these three-generation houses, which the working families built for themselves, their parents, and their children. But the children didn't have families.