Year % of GDP 2000 3.13 2001 3.81 2002 3.94 2003 3.86 2004 4.05 2005 3.95 2006 3.54 2007 3.67 2008 3.82 2009 3.9 2010 4.36 2011 4.45 2012 4.49 2013 4.63 2014 5.08 2015 5.47 2016 5.42 2017 4.72 2018 4.53 2019 4.45 2020 5.21 2021 5.42