so looking around little more on the beautiful tubes of the internet, its looks like Harp found the answer for total people living outside their country of birth, and the number of them that live in the US. I did manage to find, for the enjoyment of others who arrive here in the future in the midst of some semi fruitful google search, that the UN says that there is around 2.3 million people each year who move to another country with the intent to live there. The same study says that 1.4 million of them move to “North America.” Other stats indicate that the US gains around 1 million immigrants per year (of course, plenty of people/think tanks are interested in inflating that number to no end, but whatever). So, to conclude, yearly percentage of world immigration that goes to the US might be around 43% or so? Still way less than 70%.