Year % of GNI 2005 20.0949844633335 2006 18.8504714406128 2007 15.9611042750805 2008 11.0634121674823 2009 7.64270402057623 2010 9.36062032829591 2011 8.07722803133084 2012 7.93474903544201 2013 12.2466719473059 2014 15.4414513669743 2015 14.9052372201962 2016 15.0581448125749 2017 15.3161207224279 2018 14.9737460569778 2019 16.3675704356833 2020 14.1772798146625 2021 20.1343481255033