Year % of GDP 2000 4.9272268000061175 2001 4.875455765409051 2002 5.122785173192738 2003 4.704636973990312 2004 5.118549576430426 2005 5.585203002477205 2006 5.312131947861466 2007 5.10328636052238 2008 4.903299416921243 2009 5.344759774314085 2010 5.042701057333076 2011 4.767837269495736 2012 4.852066469417482 2013 4.893789190640771 2014 4.895849604423676 2015 4.939911973092724 2016 4.8577624342371415 2017 4.704290295633077 2018 5.151985393555085 2019 5.394274378514737 2020 6.02423314745949 2021 6.563372661785383