Article from the Economist here discussing changes in international school clients in recent years:
http://www.economist.com/news/international/21636757-english-language-schools-once-aimed-expatriates-now-cater-domestic-elites-new
http://www.economist.com/news/international/21636757-english-language-schools-once-aimed-expatriates-now-cater-domestic-elites-new