Year	% of total working-age population with basic education
1992	46.896
1993	40.4
1994	43.478
1995	42.27
1996	40.283
1997	40.733
1999	37.98
2000	41.69
2001	40.736
2002	40.528
2003	40.295
2004	39.567
2005	39.862
2006	37.096
2007	39.028
2008	37.716
2009	38.446
2010	36.58
2011	38.435
2012	38.409
2013	38.002
2014	36.237
2015	43.577
2016	39.423
2017	36.621
2018	38.643
2019	39.468
2020	40.435
2021	40.469
2022	39.523
2023	40.143