This is an ... interesting selection of countries and continents. You can be from South America or from Mexico, but no other country in Central America; You can't really be from the Middle East, Africa, Australia, NZ, etc. -- those all go into "other," although you realize they are quite distinct. Same goes for different countries in Europe -- Germany is different from the Netherlands is different from France, all of which are different from the UK and from countries in Central and Eastern Europe. On the other hand, you can specify what particular country in Asia you are from (and I won't comment on the countries that have been subsumed under "China"). Given this odd level of granularity, I am not sure what we can learn about when people are from, if they happen to not be from several specific countries in Asia or from North America.
This may be me being pedantic but South America and Europe are not countries - they are continents and education systems can vary greatly between them.
XQ reacted to fuzzylogician in Curious about the percentage of which country are we from.