Year % of GNI 2006 52.0377674922025 2007 27.1874572282617 2008 35.6111097915423 2009 32.2081243192056 2010 36.7011589693867 2011 43.3748413543798 2012 52.9077051353029 2013 26.9126966713768 2014 32.3094954480429 2015 25.1952115780113 2016 34.0991666002495 2017 32.4226720892965 2018 26.6751230696828 2019 23.4881047114402 2020 18.7723311120706 2021 14.311317652591