Year % of enrollment 1976 0.49923 1982 0.54182 1999 6.34197 2000 6.03283 2001 6.17243 2002 6.67037 2003 7.20788 2004 0 2005 0 2006 0.0016 2007 0 2008 0 2009 0 2010 0 2011 0 2012 0.00017 2013 16.36052 2014 16.58425 2015 17.39616 2016 18.2506 2017 18.94491