Year % of GNI 2006 44.1817778518121 2007 17.8709173331466 2008 26.0429365841238 2009 23.6340655375404 2010 25.4986866438801 2011 32.7197658341519 2012 43.3074183377653 2013 18.5270052076417 2014 24.5114344990576 2015 16.9109987967918 2016 25.1989311649351 2017 24.6044120449837 2018 19.9862979989861 2019 24.0769855214462 2020 18.8144578656422 2021 13.8954055824374