Year	% of total working-age population with basic education
1996	36.997
1997	39.602
1998	40.007
1999	37.123
2000	36.946
2001	38.416
2002	37.841
2003	34.762
2004	36.827
2005	36.978
2006	37.275
2007	38.481
2008	37.413
2009	37.364
2010	37.106
2011	33.611
2012	32.862
2013	32.633
2014	34.847
2015	32.566
2016	29.761
2017	31.385
2018	31.239
2019	28.808
2020	25.407
2021	25.656
2022	26.666
2023	26.017