Year	% of total secondary
2003	24.757230758667
2004	22.9039306640625
2005	25.5450096130371
2006	26.17626953125
2007	28.2501201629639
2008	31.0730800628662
2009	32.3179397583008
2010	32.0529899597168
2011	31.2597999572754
2013	39.4566993713379
2015	39.436939239502
2016	39.1676712036133
2018	43.7668495178223