Initially, eligible voters, including those born in Puerto Rico but residing in the United States, would vote on whether they wish to keep their current political status or opt for a different direction.
About how many people born in PR are living in the US right now ?
In 2000 there were 1.439M, With a PR of 3.808M this would mean the mainland portion of the electorate would be 27%. But I would guess that the mainland portion would tend to be older. If someone was born in PR, but moved to the US and had children, the children would not be included in those 1.439M. But if their sibling who remained in PR had children, they would be counted in that 3.808M.
88% of the PR-born reside in 10 states:
NY 27
FL 18
NJ 11
MA 7
PA 7
CT 6
IL 4
CA 3
TX 2
OH 2
About 6% of Puerto Ricans were born in the US.