Year % of GNI 2002 4.42844411871145 2003 3.83483015972343 2004 3.25202462557481 2005 2.62068023693446 2006 2.12055524708676 2007 1.77929806451088 2008 1.59935940350409 2009 2.53784886149572 2010 2.23577697699803 2011 2.62191805323195 2012 2.0053563818859 2013 2.62790632818561 2014 3.42680395738563 2015 3.63250764609319 2016 3.66347142701472 2017 3.04242516266327 2018 2.88359296531788 2019 3.30701256519084 2020 3.65539777860723 2021 6.09273207129043