Year	% of total enrollment
1970	12.65194
1971	12.51331
1972	12.42566
1973	12.43033
1974	12.37967
1975	12.18452
1976	12.23755
1977	11.72154
1978	11.27477
1979	11.19031
1980	11.3049
1981	11.03473
1982	10.85061
1983	10.60854
1984	10.31477
1985	10.20909
1986	10.27703
1987	10.21148
1988	10.14632
1989	9.9677
1990	9.78235
1991	9.73723
1992	9.28482
1993	9.09242
1994	9.52497
1995	9.63992
1996	9.4679
1997	9.32165
1998	9.26821
1999	9.03583
2000	9.0425
2001	9.15781
2002	9.1416
2003	9.07535
2004	9.1187
2005	8.62788
2006	8.42169
2007	8.72722
2008	8.49441
2009	8.47484
2010	8.15557
2011	7.67855
2012	7.58106
2013	7.31868
2014	6.85564
2015	6.51467
2016	6.41018
2017	6.29724
2018	6.14438