It is true that Kindle authors, editors and publishers can select either worldwide distribution or select individual countries.

However, since most authors, editors and publishers want the MAXIMUM sales and royalties, I would say the vast majority select worldwide rights. There would have to be some reason, such as a royalties or copyright dispute, to cut out Belize or any other country. Belize is a signatory to the same copyright conventions as the U.S. and most other countries.

I have a few of my books in Kindle editions, and I certainly want the maximum worldwide sales, and could care less whether they come from Albania or Zimbabwe or somewhere in between.