Year % of GNI 2008 1.3878794925469626 2009 1.2137762290638714 2010 1.079920896534906 2011 0.9826047965438754 2015 0 2016 0.00039227253106287563 2017 0.0020050587328870966 2018 0.09549872409702556 2019 0.003045922595317561 2020 2.1962912036987078E-05 2021 0