Year % of total secondary 2002 16.9584197998047 2003 16.3864192962646 2004 16.7894191741943 2005 16.8398609161377 2006 19.3624992370605 2007 19.8465194702148 2008 19.6226100921631 2009 21.6264991760254 2010 22.0571594238281 2011 22.8765697479248 2012 21.473539352417 2013 21.5141906738281 2014 24.4461803436279 2015 25.0293998718262 2016 24.2136096954346 2017 23.5205307006836 2018 24.3288803100586 2019 25.3060493469238 2020 25.9487495422363 2021 26.3940505981445 2022 26.3734703063965