Year	% of total secondary
1998	11.7193603515625
1999	12.1879901885986
2000	11.580470085144
2001	11.349630355835
2002	11.3363199234009
2003	11.3620195388794
2004	11.6564197540283
2005	11.8920402526855
2006	11.9812698364258
2007	13.0806903839111
2008	13.2496099472046
2009	13.6820497512817
2010	13.8425798416138
2011	14.389289855957
2012	14.8397703170776
2013	14.0331401824951
2014	14.5407600402832
2015	14.7248497009277
2016	15.2084798812866
2017	15.4681196212769
2018	15.9876098632812
2019	16.2819805145264
2020	16.5396595001221
2021	16.5105895996094
2022	16.621000289917