Year	% of total enrollment
1971	19.22704
1972	18.94211
1973	18.55648
1974	17.83279
1975	15.97897
1976	13.06776
1977	12.70288
1978	12.32561
1979	13.80393
1980	13.35716
1981	14.34314
1982	14.99981
1983	14.80972
1984	14.5199
1985	14.99881
1986	14.99989
1987	14.99973
1989	12.75219
1990	13.66566
1991	13.80623
1992	15.40108
1993	17.56481
1995	18.31265
1996	16.28993
1997	12.99489
1998	12.66012
1999	12.16257
2000	11.93713
2001	10.22893
2002	8.60567
2003	7.33426
2004	5.25972
2005	5.3438
2006	4.85448
2007	4.89577
2008	6.43963
2009	5.04703
2010	4.41761
2011	3.71968
2012	3.50732
2013	4.20479
2014	3.84801
2015	3.37181
2016	2.51379