Year % of GNI 1995 2.35941428853372 1996 2.38491089827287 1997 2.14740959060865 1998 1.92953139985247 1999 1.79598586877294 2000 1.6182147567459 2001 1.70290953970778 2002 1.54724132596123 2003 1.36143187497664 2004 1.18911524908307 2005 1.06600083216913 2006 0.956192151165697 2007 0.729043611655537 2008 0.614852208055907 2009 0.719508969156526 2010 1.00628477731451 2011 0.858605472133416 2012 0.840826584083868 2013 0.799101910774828 2014 0.779977017300713 2015 0.938014132549411 2016 0.915604312645501 2017 0.87613646636012 2018 0.900738821136496 2019 0.912078610545423 2020 0.867333693797813 2021 0.818249418422752