Year % of total labor force with advanced education 2006 4.42 2007 3.604 2008 3.49 2009 4.505 2010 4.72 2011 4.253 2012 4.355 2013 4.378 2014 4.369 2015 4.266 2016 4.037 2017 4.057 2018 3.697 2019 3.724 2020 4.732 2021 4.359 2022 3.378 2023 3.91