Year % of enrollment 1970 0 1971 0 1972 0 1973 0 1974 0 1975 0 2005 23.88455 2006 23.61592 2007 23.65797 2013 36.83656 2014 36.9814 2015 36.71284 2016 36.67528 2017 36.32514 2018 36.45901