Year	% of enrollment
1999	26.46243
2002	22.32479
2004	21.58687
2005	20.15057
2006	20.95473
2007	24.80246
2008	24.10899
2009	23.35579
2013	18.97745
2014	19.65906
2015	19.1885
2016	19.3956
2017	19.68946
2018	19.31977