Year % of GDP 2002 8.05468139519669 2003 11.2938307216342 2004 14.6280265160203 2005 17.9524670604972 2006 35.9573595301316 2007 80.0018919553104 2008 86.5226059313022 2009 76.2072701265178 2010 66.4715057102355 2011 55.2941016472468 2012 55.0600805820693 2013 53.7286328630556 2014 51.9905617182805 2015 50.3660700624324 2016 49.2748518263188 2017 48.9152369147338 2018 49.5624504330782 2019 49.0198067687973 2020 59.9695884168711 2021 52.2709838851401 2022 47.3174810880048 2023 43.7563950861203