Year % of GDP 2002 1.361502472545321 2003 5.3424730960480105 2004 20.046832289709872 2005 22.90582785094361 2006 24.556840299661253 2007 18.511546503526006 2008 15.789402266933694 2009 14.217076068956654 2010 12.402181871763911 2011 12.663288362803499 2012 13.428118864681121 2013 12.76052581972669 2014 12.860063599835083 2015 13.023388975499136 2016 12.306822258718167 2017 16.021494108653165 2018 15.7242879182243 2019 12.796532540894725 2020 13.314575743616814 2021 8.294758747682028 2022 12.614923776972265 2023 21.85879603593239