I’d estimate it’s closer to ~30%, at least within my grade (my House is 12 day students out of 42).
Anyways, this was from the April 20, 2018 issue of The Lawrence. Here’s the full screenshot of the article:
I was also shocked about the day student vs. boarder acceptance rate. I’m planning to try to get the newspaper to run a similar story this Spring after we get back from break; I’ll post said article (with stats) once it’s (hopefully) out.