Could also be an immigrant with a degree from another country that is learning the language or getting situated as well.
That said the story doesn't point to the trend from 1970 till now. The data is available I'm assuming. But did this happen evenly over time or in the last 5 or 10 years or?
That said the story doesn't point to the trend from 1970 till now. The data is available I'm assuming. But did this happen evenly over time or in the last 5 or 10 years or?