Year % of GNI 2006 44.2661989802902 2007 19.0283484887587 2008 27.1181245449264 2009 23.7050322679228 2010 28.1661471727655 2011 34.9605026586555 2012 44.5418474689398 2013 18.5410847936231 2014 23.9002679484634 2015 16.3796210092159 2016 25.4012013903813 2017 23.6829946446783 2018 17.933273937389 2019 22.2079799229776 2020 17.5487570480583 2021 12.6749618848025