17 is 50th.
accepted is 19-20.
16 is 34th percentile.
this is all according to the ADA guide. You cannot calculate the 50th percentile by just halving 30.
But of course, this is for TEST TAKERS, and not APPLICANTS. For applicants the average DAT is probably 18 towards 19?
If I would make a guess, I would say that ~85% of applicants have a DAT AA scores between 17 and 21. My reasoning is that I would not think many people less than the 50th percentile would even bother applying. So, 17th being 50th, from the ADA guide. 21 is 93rd.. (93-50)/50 = 86%? Oversimplified, I'm sure. This is just my guess.