Year % of GNI 2006 0.0555087355710788 2007 0.113233020261528 2008 0.00781325319177582 2009 0.00444468530268392 2010 0.0151468143288251 2011 0.0271997645013977 2012 0.0270423269352856 2013 0.0258475752446114 2014 0.020358416107575 2015 0.00853000255809932 2016 0.0202518556451673 2017 0.0200245057728097 2018 0.022636385160539 2019 0.0138686610023469 2020 0.00936817437058951 2021 0.0361496316593009