Year	% of total enrollment
1970	16.23277
1971	16.20448
1972	16.2337
1973	16.14713
1974	16.07936
1975	15.31984
1976	15.10432
1977	15.09075
1978	14.36181
1979	14.44786
1980	14.44209
1981	14.16767
1982	14.67201
1983	14.65071
1984	14.5352
1985	14.83427
1986	15.08402
1987	15.41949
1988	15.66895
1989	15.56162
1990	15.30229
1991	15.07283
1992	14.35245
1993	14.21885
1994	15.46867
1995	15.33472
1996	14.76943
1997	14.41817
1998	14.53188
1999	14.34586
2000	14.43567
2001	14.58774
2002	14.48804
2003	14.17673
2004	13.83209
2005	12.19926
2006	11.76371
2007	11.44489
2008	10.82561
2009	10.8826
2010	10.45676
2011	10.27435
2012	10.39935
2013	10.18802
2014	9.52153
2015	9.19209
2016	9.11111
2017	9.05354
2018	8.95124