The National Center for Education Statistics disagrees with 3-4%.
In 2019–20, some 21 percent of undergraduates and 11 percent of
postbaccalaureate students reported having a disability. . .
https://nces.ed.gov/fastfacts/display.asp?id=60https://disability.utexas.edu/statistics/
https://irp.osu.edu/sites/default/files/documents/2025/01/20...
> 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...