Year % of GNI 1990 6.17379923444045 1991 4.0412054356716 1992 2.94705500141777 1993 3.88527462737029 1994 6.55909599570597 1995 8.31353833068595 1996 8.3417719181296 1997 9.10721311973607 1998 7.1736044895868 1999 8.78446921458916 2000 10.4442477792468 2001 8.93000683776538 2002 8.40959788482492 2003 8.17637737777151 2004 10.3870941931277 2005 10.475188198958 2006 11.6951877434753 2007 11.3238602206086 2008 10.0839365901026 2009 4.42975300191705 2010 6.65708452246386 2011 8.39721309298223 2012 8.09063802275421 2013 8.26466665528986 2014 8.94561556891837 2015 5.39540387449816 2016 4.66057614539989 2017 6.16401103442186 2018 5.84008130565188 2019 6.00532497643442 2020 3.82743705649688 2021 7.58440770419639