Year	% of total secondary
2000	16.576789855957
2001	14.7463798522949
2002	16.3547992706299
2003	16.5278606414795
2004	16.2371406555176
2005	16.595609664917
2006	16.7090797424316
2007	16.7777996063232
2008	16.7282905578613
2009	16.8696002960205
2010	16.8385601043701
2011	16.5117702484131
2012	16.32839012146
2013	16.4235992431641
2014	16.7049694061279
2015	16.8594303131104
2016	17.4563903808594
2017	17.6056995391846
2018	17.6362895965576
2019	17.4238204956055
2020	17.5203094482422