The answer to this question is: 20%
These demographic of students are the mixture of the students who want to focus themselves on the study, have some sort of medical illness that prevent them to do so, or the students that simply have a general personality that do not find being around alcohol and social situation very pleasant.
Honestly, I'm not positive myself. All I can say is that overworking your joints without enough cool-down time will put you at high risk for arthritis.
