Year	% of total enrollment
1971	22.88186
1972	20.7698
1973	20.43583
1974	21.07032
1975	19.85911
1976	19.86873
1977	19.88839
1978	14.21063
1979	13.11827
1980	13.07952
1981	10.57584
1982	7.79018
1984	8.45768
1985	9.16322
1986	8.38173
1987	9.76425
1988	7.45696
1989	6.3663
1990	6.26498
1991	5.62384
1992	4.75556
1993	3.8627
1994	3.33167
1995	3.27259
1996	3.0281
1998	2.6589
1999	2.70705
2005	2.70606
2006	1.5382
2007	0.85618
2008	0.6285
2009	0.47492
2011	0.2253
2013	0.77967
2014	1.90968
2015	1.51275
2016	1.87146
2017	1.56721