Year % of GDP 2000 2.51082778 2001 2.9254992 2002 2.8079257 2003 2.7617898 2004 2.52882004 2005 2.24167132 2006 2.29699397 2007 2.66687727 2008 3.02516317 2009 3.79895926 2010 3.55552173 2011 3.71975923 2012 4.37614059 2013 4.28830338 2014 4.71454287 2015 4.90172052 2016 4.45400095 2017 4.36111259 2018 4.27650404 2019 3.68985248 2020 3.74658775 2021 3.2677834