I can speculate that...

The Dutch have always been a outgoing nation... and its a small country with lots of people living in it.... we are looking for space and have immigrated to all kinds of countries in the past.
Just about every Australians wants to go to Europe at some point. And of course, Amsterdam with its tolerant atmosphere has always attracted attention.

Physio education is not exactly the same. The "english" model is quite different to the Dutch....

Esther