Year % of GDP 2006 4.110172874464537 2007 4.434965207181004 2008 3.7625564353711636 2009 3.554684606497769 2010 3.0911144202036756 2011 2.920464742832853 2012 2.937318662575663 2013 2.7180654084682994 2014 2.5395951554162783 2015 2.9061821936922074 2016 3.140888035250254 2017 3.00280209638322 2018 2.908755018348195 2019 1.9788903553642625 2020 2.8540129703157575 2021 2.961071298226166 2022 2.1123576988368162 2023 2.1041182763200252