Year % of GDP 2000 0.5643958797969403 2001 0.5374077335111892 2002 0.5234928437788222 2003 0.5599772705270354 2004 0.5636581586429235 2005 0.5908242632294293 2006 0.5912096720101789 2007 0.628226456103642 2008 0.6737197699736402 2009 0.7043309137416223 2010 0.739018485661538 2011 0.7171120324095763 2012 0.6871699380151524 2013 0.7172649172839254 2014 0.7432075759682448 2015 0.7782859303636359 2016 0.7335462339131062 2017 0.6588520511712502 2018 0.6490930583289021 2019 0.6569226955728608 2020 0.620290118963185