Year	% of total working-age population with basic education
1997	71.406
1998	69.485
1999	68.993
2000	70.592
2001	69.721
2002	82.455
2003	76.403
2004	74.332
2005	72.416
2006	75.085
2007	76.267
2008	76.247
2009	76.534
2010	77.359
2011	76.569
2012	76.265
2013	75.463
2014	74.82
2015	73.843
2016	74.629
2017	74.765
2018	74.357
2019	74.076
2020	65.1
2021	71.069
2022	68.661
2023	66.579