Yes and I believe there is something inherently wrong with that.
Importing someone instead of motivating your own citizens to learn (or in many cases, refuse to teach and just hope the open door immigration policy yields desired results...) is basically outsourcing your citizens future to someone who can just leave whenever
I always wonder how they determine this since Finland frequently hit number one and the Finn's always showed up later to explain that the sad people would kill themselves so that's why the ranking is so high