The Importance of Immigration in Building America

Migrant stock is a number of people born in a country other than that in which they live. Back to 1960 you could see it was 10 million, now it's 46 point. The migrant population really got going kind of in the 90s. And so these are the basic numbers for and they put it in five year blocks. I don't know why they do that, but the number now is 46.6%.