Year	% of total enrollment
1970	16.33733
1971	16.43695
1972	16.28323
1973	16.2085
1974	15.86917
1975	15.09486
1976	15.06831
1977	15.07389
1978	14.60421
1979	14.28571
1980	14.04819
1981	13.81585
1982	14.27338
1983	14.11016
1984	14.13019
1985	14.29033
1986	14.57974
1987	14.94793
1988	15.3047
1989	15.27553
1990	15.10503
1991	15.17499
1992	14.26853
1993	14.11562
1994	15.51167
1995	15.35377
1996	14.9428
1997	14.46664
1998	14.50918
1999	14.37179
2000	14.56244
2001	14.45231
2002	14.14797
2003	14.03579
2004	13.70287
2005	12.02819
2006	11.532
2007	11.44637
2008	10.89161
2009	11.14885
2010	10.84129
2011	10.62401
2012	10.66859
2013	10.48957
2014	9.82963
2015	9.51195
2016	9.39824
2017	9.42059
2018	9.25912