Year % of GDP 2002 21.2890625 2003 20.610687022900763 2004 15.520628683693516 2005 13.600000000000001 2006 13.590263691683571 2007 14.864864864864865 2008 20 2009 24.14814814814815 2010 7.155322862129145 2011 3.684210526315789 2012 13.90625 2013 14.576802507836991 2014 11.975116640746501 2015 13.967310549777118 2016 13.710879284649776 2017 10.947712418300654 2018 13.928012519561817 2019 12.364760432766616 2020 15.117891816920942 2021 8.666666666666668