Year	% of total secondary
2006	7.48091983795166
2007	8.321120262146
2008	9.05838012695312
2009	9.59146976470947
2010	9.93984031677246
2011	10.7192697525024
2012	10.9868602752686
2013	9.83040046691895
2014	10.1693000793457
2015	10.6265001296997
2016	11.2350797653198
2017	11.9417400360107
2018	12.8231601715088
2019	13.6502199172974
2020	14.3942203521729
2021	15.076979637146
2022	15.365309715271