Year % of GDP 2000 2.95 2001 2.77 2002 2.73 2003 2.73 2004 2.66 2005 2.23 2006 2.07 2007 1.99 2008 2.05 2009 2.77 2010 2.65 2011 2.6 2012 3.16 2013 3.23 2014 3.59 2015 4.34 2016 4.42 2017 4.07 2018 3.84 2019 4.18 2020 5.85 2021 4.7