Year	% of enrollment
1971	21.52761
1972	21.30744
1973	21.66426
1975	22.28441
1976	22.97262
1977	22.16633
1978	22.2404
1979	22.80095
1980	22.4635
1981	22.8802
1982	24.40849
1983	23.79084
1984	23.70864
1985	20.49467
1986	18.10585
1987	16.47812
1988	14.57057
1989	12.50943
1990	10.74596
1991	7.36009
1992	8.12552
1993	7.68694
1994	7.62394
1995	7.69413
1996	7.72932
1997	8.04073
1998	18.36927
1999	17.83049
2000	17.24177
2001	16.91062
2002	16.97027
2003	17.98317
2004	18.45058
2005	17.87702
2006	16.61108
2007	15.40878
2008	14.37733
2009	14.19789
2010	13.41541
2011	13.22256
2012	13.92221
2013	12.75191
2014	12.36688
2016	14.26618
2017	13.79619
2018	12.97601