Year % of GNI 2001 12.151739137268 2002 12.2588292601756 2003 11.8833195898378 2004 11.3373253160617 2005 10.5233183130368 2006 9.97139916205951 2007 9.22360774614218 2008 7.62838199823345 2009 6.13883020750277 2010 4.95654938832552 2011 3.18384310620467 2012 3.74297189025966 2013 34.6934858054335 2014 25.3372607992355 2015 38.4700221808811 2016 31.1690210799102 2017 25.8845587338567 2018 24.6737752694828 2019 23.5650017811603 2020 20.6732819326466 2021 18.1045401359347