Year % of GNI 1992 5.19492989692813 1993 4.49028676857106 1994 3.8131978923902 1995 3.20660214157618 1996 3.03892162682604 1997 3.37333204087196 1998 3.09289540074543 1999 3.10678611291336 2000 3.77106546462295 2001 3.6140608141576 2002 3.01452577104114 2003 2.66708783798893 2004 2.38601905750571 2005 2.13422493301586 2006 2.01828267108783 2007 1.78919136635927 2008 1.42775413425145 2009 1.58985539608635 2010 1.65853509110724 2011 1.54303620376923 2012 1.68634983468687 2013 1.64937447606788 2014 1.68381975342311 2015 1.96838993090579 2016 1.99599130978494 2017 1.84735658165973 2018 1.67982059401738 2019 1.65480912075994 2020 1.58192758924502 2021 1.46169788969133