Year	% of total enrollment
1975	1.24326
1976	1.90476
1992	2.8931
2007	2.06587
2008	5.61322
2009	6.0039
2010	7.01084
2011	4.81806
2012	4.01799
2014	2.47739
2015	3.07631
2017	1.78966
2018	1.37311