Year % of GNI 1990 0.786696334237193 1991 0.605707690489432 1992 0.644985950590107 1993 0.827768405368208 1994 0.837824829481689 1995 0.886578513687052 1996 0.907977703272648 1997 0.974879732484119 1998 1.03133116191188 1999 1.14489337273763 2000 1.31451458865936 2001 1.5853048398493 2002 1.70421848192156 2003 1.47469485056639 2004 1.49020246881279 2005 1.17083273615965 2006 1.10333148928856 2007 1.19589493751932 2008 0.983741765470796 2009 1.36161539229699 2010 1.23359868438943 2011 1.11021728184742 2012 1.29748518470796 2013 1.19096660366786 2014 1.53999801426683 2015 2.06774899684714 2016 1.86350145643561 2017 1.94802819477145 2018 1.9444225052 2019 2.0210637027056 2020 2.02088068404434 2021 1.89142865908433