Year	% of enrollment
1970	19.69842
1998	25.83654
2000	17.19049
2001	17.19053
2002	16.15864
2003	16.53039
2005	16.17815
2006	15.99401
2007	19.42065
2008	16.33063
2009	16.30805
2010	16.68412
2011	16.51328
2012	16.01488
2013	16.469
2014	16.03463
2015	15.5062
2016	14.46901
2017	14.54293
2018	13.19718