Year	% of total secondary
2001	9.10324954986572
2002	11.3278799057007
2004	10.4092302322388
2005	13.395359992981
2006	14.9991798400879
2007	17.9776992797852
2009	16.11203956604
2010	15.6570701599121
2011	16.2093906402588
2012	16.3976001739502
2013	16.7840003967285
2014	11.0226202011108
2015	10.4807596206665
2016	10.7004203796387
2017	10.6306295394897
2018	10.5595998764038
2019	11.4784498214722
2020	11.9491395950317