My boss was chatting with me one day: "You know, over 70% immigrants are doing hard-labor jobs in the States, such as construction and farming. No Americans wants to do those things anymore. That is really a problem".
I smiled and replied: "Oh yeah, that is why I am watching Hometimes DVD at night so I could be prepared for that."
There are less than 1% of the populations have a PhD, the same applies to immigrants.