WSJ.com - The New Stresses Of Chinese Society Shape a Girl's Life:

"A shortage of university spaces in China turns school into a never-ending series of exams. Currently, only 14% of 18- to 22-year-olds in China attend college, compared with 35% in the U.S. A recent survey published in the Chinese Journal of Epidemiology reported that 45% of people surveyed are at risk due to stress. High-school students ranked the highest of any group."