Year % of total working-age population with basic education 2003 43.268601474076235 2005 42.84513143221361 2006 43.859552035392994 2007 43.500396199977054 2008 43.06404267406776 2009 42.812296034545355 2010 39.34620916054095 2011 39.98779748787058 2012 39.91132094490514 2013 39.53274919662082 2014 37.916749931759085 2015 38.15188999739654 2016 37.62161432081697 2017 37.420701777347126 2018 37.65802928538714 2019 37.42317622043175 2020 35.476113031074945 2021 36.59308560588366 2022 36.69815033899731 2023 36.76261210990626