Year % of GNI 1995 20.8809401696396 1996 20.702749187729 1997 20.0660815346216 1998 19.972530669017 1999 20.4780390580706 2000 20.4652611000052 2001 21.6995436480623 2002 22.6291354694296 2003 22.1227884357911 2004 21.9802923847989 2005 21.3338368494842 2006 20.9729963343779 2007 22.0850983896173 2008 24.2549465953738 2009 23.8173680507488 2010 22.3084845474264 2011 23.2648551277678 2012 22.395215865823 2013 22.6820891810771 2014 23.1944664305065 2015 22.6877617875385 2016 23.0328189196775 2017 23.2911629604102 2018 23.7812326029793 2019 23.9189354019056 2020 24.9994756198454 2021 23.993015125196