Year	% of total working-age population with basic education
1989	70.463
1990	70.397
1992	69.554
1995	67.334
1996	65.246
1997	65.955
1998	65.972
1999	66.736
2001	66.357
2002	67.131
2003	66.827
2004	67.345
2005	67.667
2006	67.187
2007	66.302
2008	65.606
2009	65.597
2011	62.303
2012	70.331
2013	69.894
2014	69.38
2015	64.638
2016	50.28
2017	50.224
2018	49.697
2019	49.138
2020	43.401
2021	45.164
2022	46.159
2023	44.697