Year	% of total secondary
1998	0
2002	0.450569987297058
2003	0.50721001625061
2004	0.496380001306534
2005	0.60139000415802
2007	0.627749979496002
2008	0.496930003166199
2009	0.584739983081818
2010	1.08279001712799
2012	1.06420004367828
2013	0.944379985332489
2014	0.962920010089874
2015	1.2943400144577
2017	0
2018	1.51012003421783
2019	1.59082996845245
2020	1.62417995929718
2021	1.40415000915527
2022	1.65520000457764