That breakdown does not include science majors. Can give you some estimates from my years in the early 60s. Well Over half in my years were business majors.The rest was about evenly split between Arts & Science majors and science. For some reason we had a lot of Chem majors in my class. I think there wrre only 3 Arts guys. We started out with about 35 guys.
Any one of the Engineering majors is time intensive. Kudos to the players that can do both.
I think the basic reason for better grades is better students. Guess fewer Engineers doesn’t hurt 
