> pretty high 100 years ago
irrelevant: there are no hard numbers for that and that's not the timeframe the article is discussing (since the 90s)
irrelevant: there are no hard numbers for that and that's not the timeframe the article is discussing (since the 90s)
Also I'm quite sure the numbers are there, maybe not as crisp as you like, but one could make some reasonable estimates based on immigration records from ellis island and the census through those periods.
Which would also be 1918 which is first world was and results back then were likely to he affected by that big time. And it was also time of racial segregation which would affect a lot too.