Year	% of total enrollment
1970	14.65695
1971	14.62087
1972	14.10361
1973	13.48211
1974	12.89925
1975	12.50969
1976	11.9761
1977	11.43891
1978	11.00569
1979	10.48877
1980	9.95439
1981	9.29432
1982	8.71862
1983	8.3247
1984	7.69363
1985	7.02214
1986	6.74377
1987	6.14765
1988	6.0252
1989	5.85768
1990	5.80508
1991	5.67176
1992	5.56404
1993	5.43459
1994	5.28805
1995	5.16745
1996	5.0797
1997	4.96358
1998	4.97822
1999	4.94635
2000	4.91033
2001	4.70492
2002	4.54325
2003	4.28758
2004	4.2249
2005	4.4247
2006	4.32073
2007	4.44959
2008	4.38748
2009	4.61961
2010	4.69971
2011	4.62202
2012	3.49164
2013	3.09149
2014	2.64587
2015	2.171
2016	2.08012
2017	2.01358
2018	1.96032