Each year, the Institute of International Education (IIE) conducts a survey of the number of foreign students studying in American colleges and universities and reports these data in the publication Open Doors. All of the regionally accredited institutions in NCES's Integrated Postsecondary Education Data System (IPEDS) are surveyed by IIE. The foreign student enrollment data presented in the Digest are drawn from IIE surveys, which ask institutions for information on enrollment of foreign students, as well as student characteristics, such as country of origin. For the 2004–05 survey, approximately 70.5 percent of the 2,042 institutions surveyed reported data.
Additional information can be obtained from the publication Open Doors or by contacting