Year	% of total working-age population with basic education
1993	45.029
1994	44.636
1995	44.094
1996	44.973
1997	44.11
1998	43.966
1999	44.124
2000	43.677
2001	43.086
2002	43.055
2003	44.07
2004	44
2005	36.223
2006	36.084
2007	35.638
2008	34.817
2009	34.919
2010	34.942
2011	34.687
2012	34.435
2013	33.309
2014	31.764
2015	30.81
2016	30.227
2017	30.15
2018	29.408
2019	28.477
2020	27.624
2021	28.275
2022	28.454
2023	28.72