Year	% of total enrollment
1975	10.31878
1976	10.29022
1977	10.10394
1978	10.15614
1981	8.25463
1999	3.48275
2000	3.54549
2001	3.85686
2015	1.9588
2016	1.85378
2017	1.71618
2018	1.38965