Was surprised Liberia had two until I realised it was the one prize shared between two Liberians. I guess the source gives you countries with most laureates rather than most prizes.
I looked it up - Sir W. Arthur Lewis won for economics in 1979 - his influence was in economic development and expansion of university education in the Caribbean. Sir Derek Walcott won for literature in 1992. He wrote an epic poem about his travels.
Africa has more than twice as many countries than North America. So when you start guessing random countries for each continent, you'll get around to St. Lucia more quickly. That would be my guess. (Or, there's an unusually high number of people from St. Lucia on Jetpunk.)
If you're going to use Wikipedia for your source on Nobel prize winners, can you also use Wikipedia for Russia being a trans-continental country, and have it appear in both Asia's and Europe's columns?
Brazilian Peter Medawar won the 1960 Nobel Prize in Physiology (or Medicine). It was shared with an australian and Peter had dual citizenship as he also was a british citizen. He was born in Brazil, so I think it still should be counted.
Erm, perhaps not actually
Peru 1 nobel prize literature
https://www.jetpunk.com/user-quizzes/285419/countries-with-most-nobel-laureates-by-category-with-exceptions
Can I translate the quiz to German?