For decades, campuses have hired increasing numbers of non-tenure track faculty. The number of adjunct faculty is now more than 52 percent of faculty nationally and full-time non-tenure track make up another 18 percent of the faculty, with all types of non-tenure-track faculty (NTTF) accounting for 70 percent of faculty nationally. (Approximate totals of instructional faculty based on available information from the National Center for Education Statistics 2008 Integrated Postsecondary Education Data System National Survey of Postsecondary Faculty surveys.)