Year % of GNI 2005 20.25321992070053 2006 17.842980824369796 2007 18.416271230510006 2008 17.294998529461477 2009 18.090693436411375 2010 19.861383264173174 2011 18.06994568656573 2012 11.67673624835092 2013 12.73094377865009 2014 17.103647669492013 2015 20.506215296031435 2016 18.300543546436455 2017 7.752519882124528 2018 4.72556114679601 2019 4.0219844964409175 2020 12.404427770881036 2021 10.70876710698315