Admissions; Maryland Schools;. Washington Adventist University Graduation Rates. Washington Adventist University Overall Graduation Rates. Washington Adventist University Graduation Rates – 4 Year Graduation Rate: 17.20% – 5 Year Graduation Rate: 28.70% (2016) Statement of Mission Columbia Union College is a learning community committed to the Seventh-day Adventist Christian vision of excellence and service. George Mason University Education Progressives dominate all but a few corners of American academia, but apparently they…