Year % of GDP 2000 2.56718063 2001 2.45915222 2002 2.46180677 2003 2.55710077 2004 2.27378821 2005 2.5080986 2006 2.86238265 2007 3.15306878 2008 3.19054222 2009 3.81332731 2010 3.55465937 2011 3.53044653 2012 3.74920559 2013 3.86888838 2014 4.15811014 2015 4.46586037 2016 4.65122414 2017 4.85718918 2018 5.17776585 2019 5.27607536 2020 5.35035658 2021 6.13926029