Year % of GDP 1996 2.2228000164032 1997 2.14699006080627 1998 2.09475994110107 1999 2.10767006874084 2000 2.09346008300781 2001 2.13804006576538 2002 2.17448997497559 2003 2.11994004249573 2004 2.09460997581482 2005 2.05151009559631 2006 2.05094003677368 2007 2.0245099067688 2008 2.06117010116577 2009 2.21206998825073 2010 2.17857003211975 2011 2.19161009788513 2012 2.22707009315491 2013 2.23703002929688 2014 2.27591991424561 2015 2.2270200252533 2016 2.22237992286682 2017 2.1988799571991 2018 2.19666004180908 2019 2.19179010391235 2020 2.28188991546631 2021 2.2191801071167