Having acquaintances and friends among all three, and being one of the three myself, it varies a lot, based on any number of factors (what type of each, government/private, exactly how long you've been working, country, specialisation, salary structure, etc).

Best guess based on anecdata, however, suggests doctor, even factoring in length of studies, community service/internship, etc - they really start ramping up quickly once you're all qualified, and especially if you keep on advancing your career.