Mexico: 9 puerto rico: 0, current boxing world champions...

http://en.wikipedia.org/wiki/List_of_current_world_boxing_champions

Here is a list of total (although this list is from 2010):

http://www.boxingscene.com/forums/showthread.php?t=425414

yes

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The answer depends on what boxing organization you are talking about.

Here is a list of the current (2009) heavyweight champions for the four major sanctioning bodies.

World Boxing Association - Nikolay Valuev

World Boxing Council - Vitali Klitschko

International Boxing Federation - Wladimir Klitschko

World Boxing Organization - Wladimir Klitschko

For updates, see related links below.

Many boxing World Champions were jailed in the 90s, but you're probably asking about Mike Tyson.