Year % of GDP 2000 0.5969182778130744 2001 0.6115432544757997 2002 0.6303702886854449 2003 0.6097007681258534 2004 0.6183892244477935 2005 0.6083408230013669 2006 0.6325876353652763 2007 0.650853770337362 2008 0.6840344443100999 2009 0.6180988950470148 2010 0.7234099768511655 2011 0.7141203467938123 2012 0.7020213233119591 2013 0.6180203499932747 2015 0.7140576380785129 2016 0.7538619896759406 2017 0.7211321699717315 2018 0.7349957750326164 2019 0.7629987122041673 2020 0.8260691098998871