Year % of GNI 2010 0.435835079256861 2011 0.472195331264524 2012 0.632130139451954 2013 0.710205031293013 2014 0.757688288780528 2015 0.793144869214582 2016 0.725492086019373 2017 0.7762489575881 2018 0.677180354392547 2019 0.748101893375755 2020 0.690885775208127