Year % of GDP 2002 15.193444790175892 2003 14.36733468646762 2004 15.216507184908599 2005 15.680223667511918 2006 15.2912276564636 2007 15.11463226283269 2008 14.933154858974337 2009 12.897971424379516 2010 12.815470473255907 2011 11.470933715440662 2012 11.415285438759298 2013 11.057306336720755 2014 11.335580414399594 2015 12.383018865676384 2016 11.700279102879014 2017 12.312772130108707 2018 12.819883250514868 2019 12.969207284484844 2020 13.402813683317838 2021 12.613077303559963 2022 12.610011542956482 2023 12.445557789707172