Year % of GNI 2006 0.0393932330624858 2007 0.0501662941570731 2008 0.125383479797088 2009 0.0412423836808023 2010 0.081409579133524 2011 0.107697523458489 2012 0.0636953742604182 2013 0.0323290966602002 2014 0.0284409679098027 2015 0.016100170992005 2016 0.0190664267039692 2017 0.0250132869376178 2018 0.0400851923915587 2019 0.0265569446653843 2020 0.00898900116339584 2021 0.0146952060893238