Year	% of enrollment
1988	36.58482
1990	34.10385
1992	39.47282
1993	38.26791
1994	36.64462
1996	37.31854
1997	35.4101
1998	33.28542
1999	31.27429
2000	29.08273
2001	27.98555
2002	27.92074
2003	27.00434
2004	27.34254
2005	27.82299
2006	27.83622
2007	26.67763
2008	26.08299
2009	25.62197
2010	23.2121
2011	22.60036
2012	21.74779
2013	19.66963
2014	18.195
2015	16.69696
2016	14.24274
2017	12.72429
2018	10.60813