Year % of GNI 2008 21.138280763922065 2009 22.262600003982175 2010 19.987988754523396 2011 22.097662060433446 2012 24.984377581436977 2013 25.86175634596319 2014 20.17643064590417 2015 21.319003339662032 2016 25.230471839653056 2017 28.706355351389572 2018 28.15832602097353 2019 28.237231351292447 2020 25.954713902443252 2021 26.709309042415924 2022 24.53170672713023 2023 26.139314228598415