Year % of total working-age population with basic education 1995 41.899158304029264 1996 42.18194215966446 1997 40.939044613107015 1998 42.267659464681046 1999 42.88620697688138 2000 41.66530966631708 2001 39.786701909614095 2002 39.01240017367506 2003 38.82304459171817 2004 38.151468531936295 2005 37.16132948714755 2006 37.96964674650311 2007 37.92554097281818 2008 37.77653021141813 2009 37.564618679046866 2010 37.06339427682863 2011 37.59605854975164 2012 37.460673708732415 2013 37.033748948398745 2014 36.37985296254584 2015 36.128488408234695 2016 35.84240340517057 2017 36.066325923476896 2018 35.810580333554775 2019 35.934104682927064 2020 35.05486506324323 2021 35.08315500375535 2022 35.99724449726955 2023 35.44001266272913