https://nces.ed.gov/collegenavigator/ has counts of majors of a recent graduating class.
Biggest majors:
Harvard: 219 economics, 160 social sciences general, 131 computer science
Yale: 143 economics, 122 political science, 105 cell / molecular biology
Princeton: 129 economics, 129 computer engineering, 107 public policy analysis
Stanford: 273 computer science, 126 human biology, 112 engineering other
Chicago: 315 econometrics and quantitative economics, 148 biology general, 132 mathematics
Berkeley: 561 economics, 501 computer science, 494 cell and molecular biology, 391 “electrical engineering” (most EECS students emphasize computer science) (numbers differ from career survey probably because of how double majors are counted)
Michigan: 490 business administration, 473 computer science, 377 experimental psychology
Amherst: 66 economics, 35 English, 33 mathematics
Williams: 89 econometrics and quantitative economics, 57 biology general, 48 English
Pomona: 45 economics, 37 computer science, 28 mathematics
Any surprises at these and other schools?
Seems like even the colleges supposedly focused more on academic idealist notions of liberal arts education have students choosing majors heavily for preprofessional reasons.