Year % of total secondary 2009 0.187859997153282 2010 0.192479997873306 2012 0.206310003995895 2015 0.133880004286766 2016 0.136659994721413 2017 0.185839995741844 2018 0.325830012559891 2019 0.384909987449646 2020 0.498930007219315 2021 0.483940005302429 2022 0.571550011634827