This too is an interesting topic....on the birth-rate business in Germany. About three years ago, I saw where a German university went out and looked at first, second, and third generation immigrants to Germany (lots of data from the 1960s, 1970s, 1980s and 1990s). The impression was that trend that you talk about would be obvious. Well...no.
What they found was that while the first generation might have gone to the old-country activity of three, four, five kids....the second and third generation kids grew up and adapted to the German system....either zero, one or two kids.
Reason? This triggered a fair amount of discussion and what they think is that the German system of taxation, high cost of living, open knowledge on birth-control, and high cost of rent....make large families in Germany practically impossible.
They eventually acknowledged that you can open the door and have immigrants come in, and you’d have to do this often because the migrants always adapt back to the 1.5 kids per couple.
If you go and look for an apartment big enough to handle a couple and four kids....you’d be shocked at the cost, and how few of these exist in Germany.
I sat there six months ago and did a graphical chart, with the 1.5 kid situation and negative numbers. What I eventually came to size up....unless immigration were to change this situation....is that you go from the 82-million Germans of today....in about 1,200 years....down to the last 10,000 Germans. This trend has been in place for almost fifty years now, and I don’t see much of anything changing that.
I may be thinking wrong, oranges, apples, but the situation in Europe today seems to be a repeat of the Goths and Rome. An invasion and capture and massive Roman death was not necessary.
The Romans just pissed it away
What percentage of Germany is native born Germans?