Year % of GNI 1990 5.93148063052939 1991 2.60068500627678 1992 2.89830255093433 1993 4.35889174749601 1994 2.25931599109512 1995 3.59514977671773 1996 6.37895528698475 1997 5.40683958647266 1998 11.2927917326227 1999 6.00607176378911 2000 5.63726174632372 2001 3.88861485975354 2002 4.57830190973333 2003 4.20543711632953 2004 7.18588404183424 2005 9.09364319208173 2006 10.164286056759 2007 9.70885353708358 2008 10.661816085234 2009 7.31531459869554 2010 8.55924838309323 2011 10.5681118522997 2012 10.953490177332 2013 12.0602292803924 2014 12.4791789001271 2015 12.5416085317059 2016 12.1247044813303 2017 12.5913289159743 2018 15.1427731032331 2019 12.4007959234132 2020 13.0553078261866