Year % of GNI 1990 1.12207903206128 1991 1.16961564198197 1992 1.14953686314197 1993 1.34219426135272 1994 1.52981082117137 1995 1.48543624849198 1996 1.50286433157108 1997 1.66601612591556 1998 1.91004061512206 1999 1.70949920125814 2000 1.45989946709529 2001 1.63193612630637 2002 1.59336837111449 2003 1.76887633431067 2004 1.42928935764689 2005 1.21806375445769 2006 1.60773835318601 2007 1.49371877198547 2008 1.46935498252958 2009 2.01539449783458 2010 1.50589841618519 2011 1.21286763995584 2012 1.22002271014384 2013 1.30253806752624 2014 1.39548516042001 2015 1.63865875885401 2016 2.04563919116333 2017 2.12297287144859 2018 2.16396946562203 2019 2.06098379941825 2020 2.4205545218468 2021 2.23863108759235