There are also IB schools. So it is likely that much of that 13.7% with 0 AP courses is either prep school courses claimed to be “more advanced or rigorous than AP” or IB or other advanced level courses (including whatever is available internationally for the international students who attend).
1.1% less than precalculus and 5.0% to precalculus indicates that it is possible to get admitted to Princeton without competing in the math acceleration race – but are these the most important recruited athletes and development-related applicants?
It also notes that the most common high school EC was community service (79.8%), and the second most common was varsity athletics (53.9%).