Year	% of enrollment
1971	25.14476
1972	25.60676
1973	25.75331
1974	25.80422
1976	27.35126
1977	26.72762
1978	20.32227
1979	18.10884
1980	16.67252
1981	15.54625
1982	14.87829
1983	13.85146
1984	13.30735
1985	12.50296
1986	11.40614
1987	10.71008
1988	10.04034
1989	9.62014
1990	8.90912
1991	8.5776
1992	7.74623
1993	6.94674
1994	6.27691
1998	2.03966
1999	4.31225
2000	2.62171
2001	3.72849
2002	3.46432
2003	4.47851
2004	3.01143
2005	2.9661
2006	3.3894
2007	3.16629
2009	2.59318
2010	4.83978
2011	1.98979
2012	1.89994
2013	2.63387
2014	2.45288
2015	2.78544
2016	2.25944
2017	2.15069
2018	2.53008