Year % of total secondary 2010 24.8362693786621 2011 24.5425701141357 2012 25.4554901123047 2013 25.9109802246094 2014 26.7055892944336 2015 27.386079788208 2016 27.9543704986572 2017 28.4615497589111 2018 28.629150390625 2019 28.4632091522217 2020 28.7208099365234 2021 28.6956901550293 2022 28.8791103363037