Year % of GNI 2006 43.3871626666811 2007 17.1663213851036 2008 25.3593168739152 2009 22.9809806405506 2010 24.8842559158151 2011 32.116875944139 2012 42.7527905533184 2013 17.9092465302951 2014 23.8741976880358 2015 16.3183863334214 2016 24.6352422001779 2017 24.0617233044983 2018 19.4464167183126 2019 23.5567514143493 2020 18.2501901068399 2021 13.3506451953348