Year % of GDP 2000 2.790447 2001 3.17077661 2002 2.88721824 2003 2.82690215 2004 2.76365352 2005 3.63137388 2006 3.67091465 2007 3.80248857 2008 3.87511325 2009 4.37879181 2010 4.22398996 2011 4.69264126 2012 4.00799608 2013 4.59225416 2014 4.01644135 2015 4.5429678 2016 3.39035821 2017 3.73087549 2018 3.80673027 2019 4.29847813 2020 4.01752424 2021 4.15176868