Year % of GNI 2005 9.044623483910524 2006 10.548701651070079 2007 11.44425973360724 2008 10.141016733848758 2009 9.645400727265102 2010 10.415472028845123 2014 14.441085127984756 2015 12.938277068015312 2016 14.289348484812669 2017 16.31255729613656 2018 15.02719541934882 2019 14.529958740063808 2020 13.95394879136759 2021 11.593098657703848