Year % of GDP 2000 3.471381067059927 2001 3.2979182504570033 2002 3.156236048785792 2003 3.029095719092122 2004 3.0087961037235917 2005 3.2644509113415974 2006 3.1612887824042053 2007 3.2085495587186226 2008 2.8820065347581934 2009 2.8799271128234536 2010 2.8590689295028895 2011 2.74525173580059 2012 2.7525366783475316 2013 2.7414145356524786 2014 2.768287455843397 2015 2.9164259421700356 2016 2.9317328662286464 2017 2.932293613142982 2018 3.195019567800762 2019 3.3797861975307306 2020 3.7883964785263253 2021 3.8242714119970747