Year	% of total working-age population with basic education
1997	26.556
1998	25.895
1999	24.975
2000	25.413
2001	25.036
2002	24.727
2003	24.703
2004	23.909
2005	24.72
2006	24.876
2007	24.697
2008	25.236
2009	25.1
2010	26.064
2011	26.337
2012	27.052
2013	27.714
2014	24.34
2015	26.294
2016	27.485
2017	28.198
2018	28.519
2019	28.635
2020	28.402
2021	30.129
2022	30.462
2023	32.872