главная мысль я так понимаю вот эта: The social policy experts found 50 per cent of students who immigrated to Canada go to university, compared to 31 per cent of students who had one parent who is an immigrant and only 25 per cent of students whose parents were both born in Canada.из чего вы сделали заключение, что в Канаде половина детей  полукитайцы?