Year	% of total working-age population with basic education
1998	27.584
1999	26.796
2000	25.508
2001	24.138
2002	23.15
2003	22.566
2004	22.291
2005	21.37
2006	22.262
2007	21.918
2008	21.508
2009	21.932
2010	21.364
2011	20.268
2012	20.954
2013	21.057
2014	20.771
2015	20.627
2016	21.477
2017	21.32
2018	21.033
2019	22.481
2020	22.332
2021	21.38
2022	22.187
2023	22.504