“number of non-academic administrative and professional employees at U.S. colleges and universities has more than doubled in the last 25 years”

American Institutes for Research and the New England Center for Investigative Reporting:

The number of non-academic administrative and professional employees at U.S. colleges and universities has more than doubled in the last 25 years, vastly outpacing the growth in the number of students or faculty, according to an analysis of federal figures. The table is sortable and searchable. Institutions that do not appear did not exist in 1987-88, or did not report this information that year.