Year % of GNI 2000 20.9658402751193 2001 22.949793759502 2002 21.9599093447909 2003 22.4000594778864 2004 21.2259996769628 2005 18.9130019483313 2006 18.232387632881 2007 19.4335118098707 2008 16.9469747667578 2009 18.9607163283641 2010 18.4426398797657 2011 18.2987409023676 2012 18.2030661688167 2013 20.4214063114554 2014 20.4396611034739 2015 21.4657491471608 2016 21.2542729011854 2017 21.5291213111726 2018 20.7997131419113 2019 21.8965569286724 2020 20.1460266168444 2021 18.7950949703941