Year % of GDP 2000 4.16 2001 3.47 2002 3.61 2003 3.72 2004 3.98 2005 3.9 2006 3.4 2007 2.7 2008 3.05 2009 3.5 2010 2.74 2011 2.6 2012 3.04 2013 2.66 2014 2.97 2015 3.04 2016 3.42 2017 3.05 2018 2.82 2019 2.79 2020 3.75 2021 3.92