Year % of GDP 1995 0 1996 0 1997 0 1998 0 1999 0 2000 0 2001 0 2002 0 2003 0 2004 0 2005 0 2006 0.167365650721586 2007 0.164579148653452 2008 0.167711744272889 2009 0.16617575820664 2010 0.344115143446052 2011 0.391902810841895 2012 0.373161697666316 2013 0.32445688535506 2014 0.338335806676283 2015 0.377171494362875 2016 0.339871889415688 2017 0.387242199810459 2018 0.383701352073841 2019 0.386157776686014 2020 0.374969190112832 2021 0.330932972111187