Year % of GDP 2000 3.82681274 2001 4.39997387 2002 4.64072323 2003 5.03634214 2004 4.34252119 2005 3.50426316 2006 3.69235897 2007 3.63677883 2008 4.57575798 2009 4.71686649 2010 4.74686909 2011 4.8879509 2012 5.18105078 2013 5.39425087 2014 5.49947214 2015 5.6722436 2016 6.03166533 2017 6.11313868 2018 6.2308383 2019 6.25397635 2020 6.54352617 2021 6.93183422