Year	% of enrollment
1971	22.01049
1977	21.60775
1985	16.65532
1986	15.22172
1987	14.27715
1988	13.49506
1989	14.65518
1990	11.62266
1991	11.38981
1992	10.89609
1993	10.91423
1994	10.83429
1995	10.84566
1996	10.64698
1997	10.03564
1998	9.17045
1999	8.3857
2000	7.72899
2001	7.3516
2002	6.95505
2003	6.97827
2004	6.81772
2005	6.78821
2006	6.49221
2007	6.24346
2008	5.69959
2009	5.20945
2010	4.6587
2011	4.30241
2012	4.06004
2013	4.06996
2014	3.78542
2015	3.27965
2016	2.77142
2017	2.25995