Quite interesting. Other than Germans and some Italians, relatively small numbers in the old EU compared to numbers from the new EU, though this is probably also due to Austria's location as the easternmost country of the old EU, and Vienna's location on its eastern edge. Is there any sense of affinity based on the A-H empire? Are many remnants of German-speaking communities in these countries? Or maybe just that Austria was not a NATO member?
But then the numbers from the new EU countries are quite overwhelmed by those from BiH and Serbia, and the numbers from Kosovo and Macedonia are quite high, so it is definitely not an EU-specific phenomena.
A curiosity was the high number of persons from the Dominican Republic? Is there some obvious connection, or is it like in the US where there is often chain migration, where friends and relatives are encouraged to immigrate where they are often provided housing and other assistance getting established.
Is the J in Jemen and Japan pronounced the same?
Yes, the biggest immigrant group is from the former Yugoslavia - who came as cheap labourers from the 60s onwards - and later on after the Balkan Wars.
The biggest single immigrant group these days are actually the Germans though (many students coming here and old people who buy houses and retire here).
The Eastern-European influx started mostly after 2004, when these countries joined the EU. The same thing can be witnessed in other EU countries as well, for example the UK and Germany which have also seen many Easterners come because their labour markets needed them.
I don't think it has anything to do with Austria-Hungary any more (that was way too long ago and none of the young immigrants care about this).
Regarding the Dominicans (I checked the numbers, there are only 3000 in the whole country - of which I think mostly in Vienna): They seem to be regular immigrants, but there's of course the possibility that some brought their families with them after some time.
...
Alltogether, there are ca. 20% of the Austrian population with a migration background (on of the highest rates among EU countries).
And yes, the J in Jemen and Japan is pronounced the same: Not like the "Tschey" you Americans pronounce it, but more like "yuh-mmy". In the case of Japan, it's pronounced "yuh-puhn".