* Institutions have been categorized according to the IPEDs classification of institutional control.
** Due to substantial year-to-year changes in the share of degrees awarded for-profit institutions, it was not possible to display the percentages for the 1978–1993 time period. For these values, please see the supporting table. [BINARY]
Source: U.S. Department of Education, National Center for Education Statistics, Integrated Postsecondary Data System; accessed via the National Science Foundation’s online data system, WebCASPAR.