"In 1960, there were 1.4 million public school teachers educating 36.3 million primary and secondary students. This represented a ratio of one teacher per 25.8 pupils.
In 2009, there were 3.2 million teachers - a 129 percent rise - educating 49.3 million students - a 36 percent rise. This represented a ratio of one teacher per 15.6 students."
