All of those are among the professions which require a degree. The 1/3 who end up in professions that does not require any degree are not those who have gone into management or finance.
I assumed it was professions that have a licensing requirement where you must have a specific degree (like having an MD to practice medicine) vs some areas of finances where you don't need a particular diploma to pass the required SEC exams or certifications.
I have not read the full methodology. But if I were to make an educated guess, I would say they used NOC (National Occupation Code) for determining what does or does not require a degree. NOC divides all occupations into 4 skill levels, from A (occupations that usually require university education) to D (occupations that usually do not require even a secondary school diploma). Most probably, they used the same framework and tallied the number of people in engineering, other A level occupations, and everyone else. Finance and consulting are definitely A level.
