Oregon’s public university commencement ceremonies are this weekend. There are more grads than ever before. Enrollment has grown, and more Oregon public university students are grabbing their degrees. Di Saunders with the Oregon University system says there are nearly 18,900 grads this year; but it took many of them a little more than five years to get the job done. Portland State University produced the most graduates this year; more than 5900. Eastern Oregon University has 705.  The schools expect the numbers to grow significantly over the next three to five years as students who returned to school instead of finding work during recession finish their studies.