Year % of GNI 1990 0.472687145756922 1991 0.599123912679035 1992 0.5157103597887 1993 0.596016292941083 1994 0.606071944756439 1995 0.504890123817904 1996 0.634590887737959 1997 0.618429598080664 1998 0.585865027152536 1999 0.57187314693979 2000 0.608607799130322 2001 0.648445131964527 2002 0.615050124289382 2003 0.575817344856259 2004 0.470997009328353 2005 0.438098134239739 2006 0.497907776934925 2007 0.428462629888549 2008 0.376537539596197 2009 0.407988479539864 2010 0.420208970286564 2011 0.366000706430685 2012 0.354968021409529 2013 0.364416102314749 2014 0.329681701377447 2015 0.375634148287735 2016 0.39536979152771 2017 0.365250732284191 2018 0.353912833712021 2019 0.339691268719626 2020 0.314726172309054 2021 0.294516624058133