PM, I can't provide a link for the demographics at insignificant instutes like Kumon. But I will provide another statistical data to show the demographics at the best university in the world. Only the location is USA. But if you check the campus the majority of the faculty and students seem to be Indians. You may even feel the Indians running the show there! Strange but true.
Please verify before contradicting. And I know it for a fact that almost 100% of these Indians did their basic graduation in India. It's sad that Indian graduates are not considered good enough, and still they manage to make up the major chunk of the population of the world's best technological university!
http://en.wikipedia.org/wiki/MIT