The "Current Term Enrollment Estimates Report Series" is published every December and May by the National Student Clearinghouse Research Center. It provides national enrollment estimates by institutional sector, state, enrollment intensity, age group, and gender. Enrollment estimates are adjusted for Clearinghouse data coverage rates by institutional sector, state, and year. As of fall 2018, postsecondary institutions actively submitting enrollment data to the Clearinghouse account for 97 percent of enrollments at U.S. Title IV, degree-granting institutions. Most institutions submit enrollment data to the Clearinghouse several times per term, resulting in highly current data. Moreover, since the Clearinghouse collects data at the student level, it is possible to report an unduplicated headcount, which avoids double-counting students who are simultaneously enrolled at multiple institutions. In fall 2018, overall postsecondary enrollments decreased 1.7 percent from the previous fall. Enrollments increased 2.4 percent at four-year private nonprofit institutions, but this increase was largely due to the recent conversion of a large for-profit institution to nonprofit status. Enrollments decreased among four-year for-profit institutions (-15.1 percent) and two-year public institutions (-3.2 percent) and were virtually unchanged at four-year public institutions. Taken as a whole, public sector enrollment (2-year and 4-year combined) declined by 1.3 percent this fall. [For "Current Term Enrollment Estimates: Spring 2018," see ED610017.]