Year	% of total enrollment
1970	17.55092
1971	17.5358
1972	17.39234
1973	17.33863
1974	17.36841
1975	16.96538
1976	16.94102
1977	16.47934
1978	16.26822
1979	16.12552
1980	16.02499
1981	15.79023
1982	15.96528
1983	15.4376
1984	14.98261
1985	14.58801
1986	14.45057
1987	14.32886
1988	13.99834
1989	13.6507
1990	13.43183
1991	13.39155
1992	12.73214
1993	12.52157
1994	13.33993
1995	13.35123
1996	13.05465
1997	12.78296
1998	12.8193
1999	12.67775
2000	12.64698
2001	12.5911
2002	12.32835
2003	12.22197
2004	12.2446
2005	11.36234
2006	11.06432
2007	11.05681
2008	10.6664
2009	10.89836
2010	10.51108
2011	9.83759
2012	9.71405
2013	9.43126
2014	8.86622
2015	8.5303
2016	8.4255
2017	8.30283
2018	8.16665