Year	% of total secondary
1999	7.12561988830566
2000	9.61966991424561
2001	10.4729299545288
2002	11.5832300186157
2005	14.2102098464966
2006	13.4226903915405
2007	14.8596601486206
2008	15.9718999862671
2009	14.9461097717285
2011	15.4025201797485
2012	15.9061803817749
2013	16.0849208831787
2014	16.2251091003418
2015	17.1841297149658
2016	16.771520614624
2017	16.698299407959
2018	16.1280002593994
2019	15.4928903579712
2020	15.4923496246338
2021	15.6774702072144
2022	12.5209503173828