One Piece nationalities

According to Oda:

Luffy: S. Korean

Usopp: Puerto Rican

Nami: Norwegian

Zoro: Spaniard

Robin: Mexican

Franky: French

Sanji: White African

Chopper: British

Brooke: Japanese

Ha

@youngpotter: When did Oda release that statement? Please show me. I don't think Luffy is Korean. And sorry if I sound ignorant, but Sanji-White African what?