"In the first quarter of 2018, end-of-period total enrollment declined by 1.6 percent year-over-year compared to total enrollment growth of 0.8 percent in the same period of 2017, primarily driven by declines in masters and doctoral total enrollments."
https://www.sec.gov/Archives/edgar/data/1104349/000110434918000012/cpla_33118x10-q.htm