What makes the UK's University market is involved international students?, compare with other mother's language countries:London.

I have made clear for my topic after meeting with a course leader so far. I am interested in education tourism and would like to reach more information to achieve an aim.

In London, I normally see the international students from around the world such as University of Greenwich where I am attending as a MA student, has involved a high number of international students and is ranked the highest for student satisfaction as well (The Sunday Times University Guide 2011). This topic is the big challenge of my future career.

A review of the question.
-Where are they originally from?
-How are they decide?
-What can access them?
-What makes students respect for studying?
-etc.

I have worked on  my topic but it seems unclear for other counties where I should to pick for comparing. I might choose USA and Australia to compare with the UK ( particularly in London). At the beginning, I still have lack of ideas and it would be great, if you give me any recommendation and opinion. Thank you.