Year	% of total enrollment
1970	15.16605
1971	14.09374
1972	14.88043
1973	14.47826
1974	13.87634
1975	13.07756
1976	13.17467
1977	13.30125
1978	13.97068
1979	12.80293
1980	14.49893
1981	14.2151
1982	14.25375
1983	13.9289
1984	13.68118
1985	13.44283
1986	13.56476
1987	12.84359
1988	12.85135
1989	12.68535
1990	12.78698
1991	12.48624
1992	12.35943
1993	12.04341
1994	12.11773
1995	12.74922
1996	12.6324
1997	12.24481
1998	12.58141
1999	12.38984
2000	12.4594
2001	11.2738
2002	10.98368
2003	10.39629
2004	10.28942
2005	9.77957
2006	8.89212
2007	7.88977
2008	7.06072
2009	6.46706
2010	5.9729
2011	5.74053
2012	5.63709
2013	5.16335
2014	4.51054
2015	4.37513
2016	4.19385
2017	4.4287
2018	4.4405