Year	% of total enrollment
1974	23.68428
1975	23.65306
1976	23.93345
1977	23.43482
1978	22.91489
1979	23.09762
1980	22.55955
1981	19.36073
1982	19.00217
1983	20.42778
1984	18.15167
1985	17.69941
1986	16.50595
1987	15.99457
1988	16.16085
1991	15.84507
2006	3.17955
2007	3.16626
2008	3.38939
2009	3.29742
2010	3.26227
2011	3.14131
2012	2.95997
2013	2.60867
2014	2.48738
2015	2.49436
2016	2.28107
2017	2.21264