Year	% of total working-age population with basic education
1992	42.798
1993	42.321
1994	42.216
1995	41.688
1996	42.063
1997	42.256
1999	51.6
2000	47.967
2001	51.072
2002	41.287
2003	40.966
2004	41.077
2005	41.774
2006	42.037
2007	45.163
2008	43.619
2009	40.117
2010	38.371
2011	37.369
2012	36.385
2013	35.874
2014	33.478
2015	33.151
2016	33.062
2017	31.201
2018	30.574
2019	30.96
2020	28.682
2021	30.487
2022	29.8
2023	31.369