Year	% of total enrollment
1970	12.54678
1971	12.44459
1972	12.27925
1973	12.22383
1974	11.94807
1975	11.56976
1976	11.66082
1977	11.46947
1978	10.74134
1979	10.80796
1980	11.14338
1981	10.95002
1982	10.96586
1983	10.83978
1984	10.77656
1985	10.83524
1986	11.36123
1987	11.60391
1988	11.80105
1989	11.70903
1990	11.35938
1991	11.24914
1992	10.55717
1993	10.24888
1994	10.95525
1995	11.01725
1996	10.87353
1997	10.62588
1998	10.5845
1999	10.59461
2000	10.48271
2001	10.78411
2002	10.79247
2003	10.50236
2004	10.5325
2005	9.45136
2006	9.2224
2007	9.19157
2008	8.93647
2009	9.02382
2010	8.73847
2011	8.46562
2012	8.54488
2013	8.40363
2014	8.04179
2015	7.80736
2016	7.71244
2017	7.66633
2018	7.57461