Year % of GNI 1994 13.7403203261915 1995 13.3534173117066 1996 13.7215979805993 1997 12.9848683912444 1998 13.6226423866209 1999 12.8490959461936 2000 13.3395185501586 2001 13.9163616114675 2002 12.527603403573 2003 11.078448339497 2004 9.82236301588609 2005 8.80064421758203 2006 7.90453406250702 2007 7.4784004903689 2008 7.83592029818722 2009 7.45293350780698 2010 6.4586563515575 2011 5.86632151803086 2012 5.61254545867874 2013 1.90109259635681 2014 5.8899630522133 2015 6.79873468621784 2016 5.85624692173364 2017 6.75632336948234 2018 4.9593962881669 2019 5.03839961420915 2020 4.56133242008116 2021 4.38634648977781