Year % of GNI 2004 0 2005 0.0183044409882376 2006 0 2007 0 2008 0 2009 0 2010 0 2011 0 2012 0 2013 0 2014 0.429955495852972 2015 0.506321004267759 2016 0.528333721548889 2017 0.598358959527429 2018 0.688418391407235 2019 0.654259820690651 2020 0.656267925956941 2021 0.641753988817239