Year % of GDP 2000 3.4118980546067426 2001 3.377410071341214 2002 3.614347687001847 2003 3.693736361601131 2004 3.5946010543173785 2005 3.6049422859887703 2006 3.429967260212884 2007 3.4570128057050815 2008 3.4342403329203615 2009 3.769423840144135 2010 3.6208949638543793 2011 3.501506042118522 2012 3.5451511668067406 2013 3.6612369315053197 2014 3.7382707865185156 2015 3.957147840093195 2016 4.030137601079907 2017 3.939738347098256 2018 3.9393195868741153 2019 4.127501372873379 2020 5.202154499375986 2021 5.392190215894764