Year % of GNI 1993 10.077221857032 1994 5.40619387624521 1995 4.53632698900895 1996 2.8957301118781 1997 5.72901662787048 1998 6.83467929537169 1999 4.44426595712093 2000 6.95961858754596 2001 4.31051652800127 2002 4.40470704408041 2003 7.59177686153786 2004 12.1941599172069 2005 14.5764450988671 2006 16.7984088551668 2007 16.2372850248032 2008 17.8697867213224 2009 13.4180771697079 2010 14.0976838724362 2011 19.3275282471174 2012 18.2031474649467 2013 15.7917777176864 2014 14.9527789852769 2015 15.8524982230726 2016 12.7938829751333 2017 14.0731852092116 2018 14.8147446360142 2019 13.4914378557275 2020 12.1913000598105 2021 13.3506671279207