Year	% of total secondary
1998	11.4826803207397
1999	11.4516000747681
2000	11.5037803649902
2001	11.5864896774292
2002	11.8094396591187
2003	12.0233697891235
2004	11.8660898208618
2005	12.0749101638794
2006	12.3683700561523
2007	12.70578956604
2008	13.0575304031372
2009	13.4355497360229
2010	13.7998695373535
2011	14.0284700393677
2012	14.0585803985596
2013	14.880410194397
2014	14.9591503143311
2015	15.1364498138428
2016	15.2510995864868
2017	15.4620704650879
2018	15.5989398956299
2019	15.7409000396729
2020	15.5884199142456
2021	15.9674196243286
2022	15.9760303497314