Year	% of total enrollment
1970	14.78271
1971	13.66724
1972	14.40568
1973	14.17681
1974	13.65807
1975	12.93277
1976	13.01408
1977	13.1491
1978	13.75471
1979	12.64533
1980	14.19641
1981	13.90617
1982	13.92681
1983	13.59294
1984	13.36846
1985	13.13988
1986	13.25734
1987	12.54239
1988	12.54319
1989	12.36569
1990	12.46412
1991	12.16978
1992	12.0474
1993	11.73801
1994	11.8051
1995	12.41859
1996	12.29951
1997	11.90943
1998	12.24026
1999	12.04195
2000	12.11942
2001	10.98459
2002	10.70638
2003	10.14713
2004	10.03923
2005	9.55725
2006	8.70733
2007	7.74884
2008	6.96206
2009	6.38849
2010	5.92391
2011	5.70431
2012	5.59388
2013	5.13036
2014	4.48167
2015	4.34288
2016	4.1633
2017	4.38108
2018	4.39285