Year	% of total enrollment
1970	12.55084
1971	12.44873
1972	12.28326
1973	12.22749
1974	11.95124
1975	11.57283
1976	11.66391
1977	11.47226
1978	10.7437
1979	10.81018
1980	11.14553
1981	10.95203
1982	10.96779
1983	10.84163
1984	10.77833
1985	10.83703
1986	11.36317
1987	11.60583
1988	11.80295
1989	11.71088
1990	11.36121
1991	11.25088
1992	10.55873
1993	10.25033
1994	10.95676
1995	11.01872
1996	10.87498
1997	10.62717
1998	10.58573
1999	10.59583
2000	10.48387
2001	10.78522
2002	10.79351
2003	10.5033
2004	10.53335
2005	9.45211
2006	9.22308
2007	9.19221
2008	8.93706
2009	9.02439
2010	8.73902
2011	8.46612
2012	8.54537
2013	8.4041
2014	8.04224
2015	7.80779
2016	7.71286
2017	7.66673
2018	7.57502