Year % of GNI 1990 38.9317093352279 1991 40.1399834792844 1992 31.0524950878661 1993 18.4801443990806 1994 20.744425584784 1995 23.0356597033777 1996 19.5706403529071 1997 23.6848007209971 1998 20.6942836250646 1999 32.8702439317873 2000 32.9447550187037 2001 18.2732056803632 2002 17.2936729031185 2003 14.1344219189278 2004 16.0146827057849 2005 21.3500423524933 2006 35.9554554325786 2007 13.3448989000262 2008 18.410682725576 2009 14.490853363554 2010 10.2444010102375 2011 9.34861932837115 2012 19.0398374024628 2013 6.04901848644182 2014 10.32182372585 2015 6.48748993142931 2016 5.49591883975005 2017 6.83651910420336 2018 6.21102341179283 2019 9.51700587318642 2020 16.6445439721868 2021 20.5520616576926