Year % of enrollment 1971 12.89382 1972 12.42055 1973 13.38242 1974 13.15866 1975 12.28148 1976 12.84884 1977 5.24047 1978 1.29173 1979 1.66356 1980 1.43589 1981 2.06365 1982 1.76038 1983 2.30139 1984 3.77338 1985 3.59075 1986 4.57232 1987 0 1988 0 1989 0 1990 10.9288 1992 18.26025 1993 14.31083 1996 11.68794 1998 14.53305 1999 14.47019 2000 17.43898 2001 16.95383 2002 16.84962 2003 15.68682 2004 16.72683 2005 17.47384 2006 11.54024 2007 13.57907 2008 16.18107 2010 13.38614 2011 13.37316 2012 13.81166 2013 17.67953 2014 16.6335 2015 16.35588 2016 16.30783 2017 16.55348 2018 19.02187