Year	% of total working-age population with basic education
1992	71.408
1993	70.285
1994	69.573
1995	69.053
1996	68.907
1997	68.826
1999	68.872
2000	69.077
2001	68.377
2002	67.907
2003	67.913
2004	67.44
2005	78.012
2006	78.431
2007	78.02
2008	72.912
2009	71.136
2010	69.214
2011	70.634
2012	69.149
2013	68.707
2014	68.487
2015	68.685
2016	68.418
2017	68.632
2018	68.745
2019	68.537
2020	67.122
2021	65.558
2022	58.078
2023	56.886