Year % of enrollment 1971 13.02145 1972 12.36595 1973 12.14123 1974 12.1642 1975 11.86464 1976 11.52317 1977 11.29835 1978 11.00476 1979 10.88968 1999 12.96352 2000 11.70904 2001 11.70908 2002 11.38284 2003 11.11179 2004 10.85268 2005 11.71734 2006 10.69422 2007 11.17227 2008 10.67001 2009 10.56095 2010 9.90354 2011 9.40757 2012 9.50196 2013 10.63759 2014 7.6332 2015 7.6657 2016 7.72949 2017 7.57344