Year % of GNI 1996 23.821610913606 1997 24.3292224902979 1998 26.4616528916743 1999 30.3110245724541 2000 26.5207155372687 2001 23.7100359842492 2002 20.4666017193264 2003 17.8676106928466 2004 16.59905083776 2005 14.9586053881444 2006 14.2184298267892 2007 14.2261509262009 2008 13.3369071106011 2009 13.3013647077135 2010 10.9757576234104 2011 9.40279032031775 2012 8.52343410391274 2013 9.0488372899738 2014 9.24515748875548 2015 13.7598290775151 2016 10.441931585907 2017 10.0799890881724 2018 11.106955833194 2019 11.3445876859853 2020 11.8480163058113 2021 12.210627886651