Year % of GDP 2005 0 2006 19.246256510416668 2007 21.429558328407712 2008 19.925213000349714 2009 20.223361664199967 2010 19.012900102224485 2011 18.61791494536403 2012 18.669495581298953 2013 18.94421005430966 2014 20.824527732702965 2015 21.720379685255526 2016 20.95597073756647 2017 21.084971668184664 2018 20.02160263491013 2019 20.84241251140862 2020 22.855631261566074 2021 22.721249123182574 2022 22.98930929875268