Year % of GNI 2000 2.38424098474657 2001 2.41690296083549 2002 2.41259952094107 2003 2.73920408454032 2004 2.85296165894861 2005 2.92178126859057 2006 2.89955251061153 2007 2.79011224655666 2008 2.53790364247351 2009 2.72662068532641 2010 2.97607201438343 2011 2.93791509364229 2012 2.9648548704285 2013 2.95669260677473 2014 2.84875614996364 2015 2.41575602575657 2016 2.77186438470421 2017 3.20122955321758 2018 3.19900764252 2019 3.43548751819262 2020 3.77242706825474 2021 4.05735081468974