Year	% of enrollment
1970	26.41807
1971	26.97362
1972	26.88131
1973	25.42047
1974	25.67762
1975	23.60267
1976	22.6529
1977	21.52837
1978	21.00993
1979	20.54599
1980	19.88591
1981	19.60755
1982	20.63159
1983	21.98864
1984	21.56428
1985	20.4801
1986	20.66017
1987	20.17422
1988	19.82145
1989	19.66062
1990	19.10438
1991	19.02341
1992	18.8435
1993	20.62586
1994	20.41807
1995	20.50401
1996	21.30173
2009	31.45335
2010	29.50957
2011	28.09057
2012	28.44016
2013	30.46787
2014	29.19101
2015	29.19173
2016	27.64864
2017	28.27236