My son's interesting claim

My son Peter has been making an interesting claim. He claims that he has been ranked in the top 20 rated players BORN IN THE USA.

At first I thought this was ridiculous but now I am not so sure.

Peter’s peak rating was in 2002 when he reached 2313.

Looking at the top-100 list, there were 79 players who I am sure were not born in the USA, leaving 21 candidates.

The top rated players who I believe were born in the USA are Christiansen, Benjamin, Finegold, Kraai and DeFirmian.

However, were Finegold and DeFirmian really born in the USA? I believe that they were, but I am not sure.

Does anybody know how many of the top 200 were born in the USA?

Sam Sloan