Year % of GDP 2000 1.50591624 2001 1.56618142 2002 1.50943291 2003 1.62846565 2004 1.611678 2005 1.58765554 2006 1.65727472 2007 1.80025303 2008 2.08452892 2009 2.34723687 2010 2.36928177 2011 2.37497997 2012 2.31367421 2013 2.55259371 2014 2.49005699 2015 2.288836 2016 2.75642586 2017 3.69730067 2018 2.96741509 2019 3.01476622 2020 4.63674402 2021 3.98074675