Year % of GNI 1990 4.60247848855642 1991 4.68667854386746 1992 4.12098105336521 1993 3.67086349352518 1994 3.37423380453205 1995 3.15595297527479 1996 2.97758240302299 1997 2.85407265327633 1998 2.74436592738633 1999 2.54837337186585 2000 2.34383459424761 2001 2.22525085807909 2002 2.05964983233123 2003 1.8142160517951 2004 1.69364592979331 2005 1.63148029324428 2006 1.48150750259653 2007 1.35339288804373 2008 1.21252307680501 2009 1.21262176991066 2010 1.07695666241064 2011 0.954003357739056 2012 0.948834002146751 2013 0.891915149211904 2014 0.810694218787607 2015 0.817605364439954 2016 0.820189138723697 2017 0.798245173971034 2018 0.837589314421184 2019 0.846661310893168 2020 0.878594740991386