Note, "cheating on assignment or exam during your time at the institution" is a ridiculously broad net to cast. It includes everything from "merely asking one friend on one random night if they got the same numerical answer on the first freshman-year homework (despite both of you working independently and figuring out the entire derivations onto your own)" to "blatantly copying every answer on your final exams every single semester." The fact that they don't distinguish radically different things makes their 30% figure suspect.