Year	% of total enrollment
1971	20.93271
1972	19.03851
1973	18.362
1974	20.4381
1999	1.71377
2000	0.52141
2001	0.69871
2002	0.69157
2003	0.69668
2004	0.55129
2005	0.53336
2006	0.51495
2007	0.58703
2008	0.44588
2009	0.35274
2010	0.29495
2018	0.47991