GER/AUT/SUI: Big City Population Boom

[ZuWo]

Not to be overly picky, but who came up with the claim that Zurich has more than 1.3 million inhabitants? The city itself only has a population of roughly 390'000 people, which makes it the largest Swiss town by far but obviously doesn't compare to the other cities mentioned. One could only take such a high number of inhabitants at face value if all of the suburbs in the proximity of Zurich are counted, but that's a questionable approach unless the same is done with Munich, Hamburg, Berlin or Vienna.
At least it can be said that the main point still stands: Like Vienna, Berlin, Hamburg and Munich, Zurich has experienced a considerable growth of population in the recent years.

[ZuWo]

I don't know but those are impressive growth figures, particularly in countries whose overall population is static or in decline.

Switzerland's population hasn't been static or in decline in recent history. On the contrary, there has been steady growth in the number of inhabitants thanks to continued immigration. In fact, population growth has been increasing in the last few years, and no end of this development is in sight (which is good for me as long as I teach German to foreigners).