Year % of GNI 2007 30.0070464620392 2008 29.3743950784004 2009 26.3109181814477 2010 27.2056163518444 2011 26.8321762056773 2012 21.9166527169508 2013 22.3215624556046 2014 20.0996794054318 2015 21.6944011083122 2016 26.4010509905702 2017 23.7792948063522 2018 27.4943796132324 2019 28.2693937629616 2020 26.3276726419433 2021 24.1968998387929