Unfortunately, this article is 3 years old and the data is inaccurate. Immigration from PR to USA has been huge in last three years; thus, you should update your data!
Yeah, But if you look even closer and do the math. They updated that article in 2020. Its four years out of date. Hence the reason why the url has 21 in it and the current version of the article has 20 states but the current number is 18 states.
A comment on that linked story says:
Yeah, But if you look even closer and do the math. They updated that article in 2020. Its four years out of date. Hence the reason why the url has 21 in it and the current version of the article has 20 states but the current number is 18 states.