Year % of GNI 1990 7.75363956986265 1991 9.52725485838294 1992 8.40409799405439 1993 9.43141413255064 1994 10.9229222644022 1995 12.6416969348042 1996 12.713660579904 1997 15.7885023251146 1998 15.4641709309827 1999 14.6857074026944 2000 16.7871088467403 2001 18.8736960990457 2002 16.1585614718127 2003 15.4771456297937 2004 17.8794948030429 2005 22.1244773663544 2006 23.5572791019408 2007 23.5402505979163 2008 23.1856021418176 2009 18.5264086853436 2010 20.201034735611 2011 20.4697218889521 2012 22.6741898640892 2013 22.3209419494908 2014 22.0473345717674 2015 19.2830254042899 2016 17.0760293491079 2017 17.3344550102115 2018 18.6980118162893 2019 15.8691418699392 2020 13.5808900722214 2021 20.2075954169296