2015:小留 under 41%, graduate 39.5%, the rest are mostly OPT

 

"Particularly remarkable is the fast rate of growth in the undergraduate student population. Chinese graduate students once far outnumbered their undergraduate counterparts at U.S. schools, but by 2015, 41 percent of Chinese students in the United States were undergraduates, compared with 39.6 percent for graduate students."

 

https://foreignpolicy.com/2015/11/16/china-us-colleges-education-chinese-students-university/