Year % of GNI 2009 1.73133231201654 2010 12.0681328124057 2011 24.1586358740761 2012 26.9301337162507 2013 26.0703082105561 2014 21.5233671321589 2015 22.1130775535448 2016 15.4766129809088 2017 14.7480536106374 2018 16.5788051010062 2019 20.5432342017307