Exactly. 10-15 years ago and more the situation or workers had been pretty grim in Poland so many people decided to migrate when borders opened.

Now with economy booming the employers are desperate with lack of workers and they are bringing them from wherever they can - Kazakhstan, India etc. Ukraine is the obvious source due to proximity and cultural similarities.

https://www.google.com/publicdata/explore?ds=z8o7pt6rd5uqa6_...