Year	% of total enrollment
1970	14.71896
1971	13.53465
1972	14.04076
1973	14.01751
1974	13.70616
1975	13.1181
1976	13.31581
1977	13.63386
1978	14.25921
1979	13.06252
1980	14.60584
1981	14.24827
1982	14.22385
1983	13.90003
1984	13.66215
1985	13.42502
1986	13.52555
1987	12.77729
1988	12.71034
1989	12.56512
1990	12.67896
1991	12.39379
1992	12.26809
1993	11.94606
1994	12.01808
1995	12.6373
1996	12.51761
1997	12.12247
1998	12.46018
1999	12.26495
2000	12.34375
2001	11.18006
2002	10.89258
2003	10.32206
2004	10.21105
2005	9.72042
2006	8.85436
2007	7.8764
2008	7.07341
2009	6.48966
2010	6.0137
2011	5.78482
2012	5.67168
2013	5.19727
2014	4.53671
2015	4.39501
2016	4.21308
2017	4.43539
2018	4.44694