Year % of GNI 1991 22.190250769694845 1992 22.52609156156623 1993 27.486990814670992 1994 25.292742758416797 1995 20.495813842274707 1996 19.044899114068432 1997 16.635487662762262 1998 15.428950362032712 1999 13.701884119696622 2000 12.74029873619471 2001 10.156697548510571 2002 12.219340899391382 2003 12.32737144597061 2004 9.342119363139814 2005 10.168294000480682 2006 14.569737453371252 2007 11.698721043480017 2008 12.864711463526168 2009 14.648987487505316 2010 11.521240192403843 2011 11.331139670332695 2012 10.470855168344771 2013 7.275234802832233 2014 7.339308158209391 2015 6.934606809065863 2016 7.018487879753707 2017 5.1791974216132814 2018 6.195310167947285 2019 8.764368569003121 2020 8.402699962446345 2021 5.288525556275401 2022 1.5811138128015607