Year % of total working-age population with basic education 2008 24.966 2009 27.002 2010 28.331 2011 26.748 2012 27.22 2013 27.531 2014 27.801 2015 29.446 2016 26.643 2017 25.079 2018 27.421 2019 38.674 2020 27.688 2021 29.528 2022 27.45