Where would I find statistics on the number of students with disabilities attending UHD?
It is probably best to contact the director of UHD's Office of Disability Services http://www.uhd.edu/disability/.
Also, the National Center for Education Statistics publishes a national report on students with disabilities in higher education. This would give you some background statistics, and the data file for the survey NCES conducted may give UHD data. At any rate, though, you may be able to use the information for comparative purposes. You can find the publications listed here: http://ies.ed.gov/search/?q=students+with+disabilities+higher+education