In 1969, 78 percent of instructional staff at US institutions of higher education were tenured or on the tenure track; today, after decades of institutional expansion amid stagnant or dwindling budgets, the figure is 33 percent. More than one million workers now serve as nonpermanent faculty in the US, constituting 50 percent of the instructional workforce at public Ph.D.-granting institutions, 56 percent at public masters degree–granting institutions, 62 percent at public bachelors degree–granting institutions, 83 percent at public community colleges, and 93 percent at for-profit institutions.
Source : Serfs of Academe
