Year % of GNI 2005 13.6862097537868 2006 14.5372187686867 2007 16.2509390248956 2008 16.389524508394 2009 12.2716478218345 2010 12.9528062520612 2011 13.4648673786147 2012 12.6548756508923 2013 12.1171044047899 2014 12.494227812772 2015 12.3233635703271 2016 13.7412411064545 2017 12.8333368359174 2018 13.0769863759074 2019 13.6974147078732 2020 12.9896215048242 2021 12.7352568983809