Year % of GNI 2010 9.24343773276125 2011 11.9066249661505 2012 12.7414713081762 2013 10.8207213836683 2014 10.9029652449176 2015 10.559089260769 2016 10.2266351317198 2017 9.94857842262669 2018 10.3458871409256 2019 9.717146390404 2020 9.50181522865877 2021 8.85177318927197