Year % of GNI 2005 20.0476140353885 2006 18.805820053087 2007 15.9165093071418 2008 11.0159227751263 2009 7.59229061516076 2010 9.31496665370709 2011 8.03109844444374 2012 7.89077775880078 2013 12.207448089905 2014 15.4089047784882 2015 14.878312269366 2016 15.0363480027696 2017 15.2966822622818 2018 14.9548580558364 2019 16.3486885791591 2020 14.1575555567503 2021 20.1155528566765