We're talking about postdocs though, which is a completely different population than college students. I found this [1] which estimates that 51% of US postdocs

We're talking about postdocs though, which is a completely different population than college students. I found this [1] which estimates that 51% of US postdocs are foreign-born as of 2018. [1] https://elifesciences.org/articles/40189 https://elifesciences.org/articles/40189