Year	% of total secondary
1999	0
2002	8.8339900970459
2003	9.40680027008057
2004	10.1174001693726
2005	12.6384801864624
2006	16.7758197784424
2008	22.6255702972412
2009	23.0761299133301
2010	27.1791000366211
2011	25.7392196655273
2012	25.0734195709229
2013	25.4879894256592
2014	28.9660701751709
2015	29.3596706390381
2016	26.5656299591064
2018	24.5646705627441
2019	25.9596004486084
2020	32.1350288391113