Year % of GNI 2002 15.8320974816544 2003 15.4673578378841 2004 19.598613585831 2005 22.2051689603157 2006 22.7165366199397 2007 21.2157063134794 2008 23.3225521102233 2009 16.5177916929267 2010 17.7823294683291 2011 3.72822356343438 2012 17.375110712474 2013 9.9720716556047 2014 3.66094293404142 2015 1.81341364354737 2016 1.32132282862655 2017 3.83954220531732 2018 6.4449536732866 2019 7.6962791895323 2020 1.21087014378908 2021 13.5040314410146