I am glad someone pointed this out. I don't know the percentage but a lot of students game their GPA in school too. From pushing professors to give group assignments to using mental health days to claiming to have learning disabilities, these are all tools they have including cheating. Professors don't usually change their homework assignments every time they offer a course and online sites sell the answers. Professors know but they can't risk giving students below an A-. It causes a shit storm.