Year % of total working-age population with advanced education 2005 62.867 2006 63.427 2007 62.735 2008 64.698 2009 62.606 2010 61.405 2011 61.379 2012 64.656 2013 64.353 2014 61.615 2015 69.013 2016 57.216 2018 61.196 2019 64.668 2021 67.468