This cites an NCES study which doesn't appears to be locked down to approved researchers, but it provides a national number:

> In 2019-20, 8% of students registered as having a disability with their institution. This rate was 10% at non-profit institutions, 7% at for-profit institutions, and 7% of students at public institutions.

https://pnpi.org/wp-content/uploads/2025/05/StudentswithDisa...