Year % of total secondary 2011 1.7057900428772 2013 2.30124998092651 2014 2.14685988426208 2015 2.3067901134491 2018 2.47293996810913 2019 2.64488005638123 2020 2.79327988624573 2021 2.85321998596191 2022 2.93624997138977