Year % of GDP 2000 3.34 2001 3.49 2002 3.68 2003 4.46 2004 4.04 2005 4.41 2006 4.02 2007 4.09 2008 4.07 2009 4.15 2010 4.51 2011 3.36 2012 3.47 2013 4.12 2014 3.97 2015 3.85 2016 3.97 2017 4.08 2018 4.4 2019 4.58 2020 4.99 2021 4.9