Year	% of total secondary
1998	11.072190284729
1999	0
2000	0
2002	0.206670001149178
2004	1.47555994987488
2005	2.0900399684906
2010	0.942589998245239
2011	1.16410005092621
2012	0.85029000043869
2013	1.32515001296997
2015	2.55856990814209
2016	1.43810999393463