Year	% of total enrollment
1971	5.75485
1972	5.33095
1973	4.9945
1998	1.41704
1999	1.52813
2002	1.22049
2004	1.24463
2011	2.46069
2012	2.4563
2013	2.57498
2014	2.66022
2015	2.74966
2016	2.84471
2017	2.91775