Year	% of enrollment
1970	35.7844
1971	32.60525
1972	32.05936
1973	33.9989
1974	33.59231
1976	25.53332
1977	24.45325
1978	35.04461
1979	33.83771
1980	34.41337
1981	35.40414
1982	33.97183
1983	35.05784
1984	33.9504
1985	33.86783
1986	33.42765
1987	33.06454
1988	33.20406
1989	33.07427
1990	33.25181
1991	32.83095
1992	31.92934
1993	31.55938
1994	33.40047
1995	36.14075
1996	34.80172
1998	40.76069
1999	42.90302
2000	30.5501
2001	30.80623
2002	31.07976
2003	32.30452
2004	33.64707
2005	33.45213
2006	32.96254
2007	31.08921
2008	29.88807
2009	28.70496
2010	27.79091
2011	26.36021
2012	25.1458
2013	24.89789
2014	23.86162
2015	22.61024
2016	21.73547
2017	21.07759