Year	% of total enrollment
1971	20.83243
1974	17.44361
1987	3.92411
1988	4.07141
1995	3.68554
1999	4.01216
2000	4.16932
2001	3.68596
2002	3.64931
2003	3.59245
2007	3.51362
2008	3.53781
2011	5.01757
2012	2.63481
2013	2.14085
2014	1.30725
2015	0.75315
2016	0.52569
2017	0.56638
2018	0.59637