It looks like the State Department doesn't keep such a statistic, but the estimate is in the vicinity of 2%. https://en.wikipedia.org/wiki/American_diaspora htt

It looks like the State Department doesn't keep such a statistic, but the estimate is in the vicinity of 2%. https://en.wikipedia.org/wiki/American_diaspora https://en.wikipedia.org/wiki/American_diaspora It's definitely non-zero, but there's also no evidence actual percentage of expats has increased even if reported desire to become one has increased.