Year % of GNI 1990 7.326165378464085 1991 7.459818565458552 1992 8.765700636836295 1993 8.810818896784689 1994 11.391690377988088 1995 11.836770369086564 1996 12.010370754001833 1997 12.479474674091637 1998 12.539613005176086 1999 12.641510196659933 2000 12.238065944998763 2001 12.5669183965153 2002 14.033085649169971 2003 16.340186621067232 2004 18.299166612761667 2005 18.874922137373762 2006 20.33680975273032 2007 21.150341740149575 2008 18.624889789824635 2009 20.50416219823236 2010 21.77657276621233 2011 20.089255346584316 2012 20.238895580503417 2013 19.638871349632787 2014 19.233970114951862 2015 19.092731771281077 2016 18.45817837740507 2017 18.995122908951338 2018 18.16154759437436 2019 17.65672004349815 2020 16.317138938835775 2021 16.68014618389513