Year % of GNI 1990 7.326165378464086 1991 7.45981856545855 1992 8.765700636836295 1993 8.810818896784683 1994 11.391690377988088 1995 11.83677036908656 1996 12.010370754001837 1997 12.479474674091634 1998 12.539613005176086 1999 12.641510196659937 2000 12.238065944998763 2001 12.566918396515298 2002 14.033085649169973 2003 16.34018662106724 2004 18.29916661276166 2005 18.874922137373762 2006 20.336809752730325 2007 21.15034174014958 2008 18.624889789824635 2009 20.504162198232365 2010 21.77657276621233 2011 20.089255346584316 2012 20.238895580503417 2013 19.638871349632783 2014 19.233970114951862 2015 19.092731771281088 2016 18.458178377405073 2017 18.995122908951345 2018 18.161547594374362 2019 17.656720043498158 2020 16.317138938835775 2021 16.68014618389513