Year % of GDP 2000 2.98060012 2001 3.49099278 2002 3.59433174 2003 3.56305766 2004 3.44779563 2005 3.46698904 2006 3.57004833 2007 4.07867432 2008 4.53821993 2009 4.52587652 2010 4.49519491 2011 4.54942894 2012 4.36242819 2013 4.43660116 2014 4.88208723 2015 4.65365601 2016 4.76508141 2017 4.61620188 2018 4.74657917 2019 4.81374073 2020 5.30974436 2021 4.98043823