Year	% of enrollment
1973	17.6917
1974	16.58527
1975	15.55898
1976	15.94012
1977	15.86356
1978	15.60432
1979	15.24237
1980	13.91989
1981	12.82732
1982	12.12377
1983	11.4073
1984	10.0245
1985	9.05024
1986	6.50538
1987	6.05785
1988	6.12644
1989	5.85956
1990	6.11323
1991	5.93736
1992	6.24687
1993	6.71555
1994	7.13496
1995	7.16921
1996	8.54234
1997	9.78321
1999	11.15864
2000	12.46409
2001	12.24385
2002	11.84074
2003	11.95159
2004	12.06763
2005	12.23451
2006	12.62192
2007	11.64692
2008	10.27519
2009	10.83598
2010	10.78314
2011	9.26718
2012	8.32556
2013	8.02078
2014	7.16842
2015	6.73233
2016	6.7546
2017	6.87842
2018	6.56563