Year	% of total enrollment
1970	10.53508
1971	15.27675
1972	15.44346
1973	13.31432
1974	10.40413
1975	10.14655
1976	10.55532
1977	10.51996
1978	10.7001
1979	10.87428
1980	10.87762
1981	11.81273
1982	12.81454
1983	12.9039
1984	12.58028
1985	13.97754
1986	14.8742
1987	15.28194
1988	15.08159
1989	14.89275
1990	14.8888
1991	15.30872
1992	15.36234
1993	15.78184
1994	14.79291
1995	15.58366
1996	15.49454
1997	15.74948
1998	15.3138
1999	17.06244
2000	16.08189
2001	16.70164
2002	15.47812
2003	16.34012
2004	16.15786
2005	17.31529
2006	16.53692
2007	18.03571
2009	16.88315
2010	15.11957
2011	15.48717
2012	15.48521
2013	16.88987
2014	15.66315
2015	15.60372
2016	13.93142
2017	13.44909