Year % of GNI 1990 31.5435037635757 1991 33.4032334157958 1992 29.0026652404703 1993 30.7129884962356 1994 18.7516569850103 1995 16.8350089276658 1996 27.0629453395526 1997 28.3179623946816 1998 30.5141426156512 1999 32.8973056558753 2000 33.1336689021601 2001 38.2252233958283 2002 27.3725524651499 2003 22.8119973682664 2004 21.1552952686456 2005 31.3341005692882 2006 27.4360933366174 2007 28.5573579902638 2008 23.1568883866616 2009 12.7813647942076 2010 19.468897841055 2011 27.3646124159549 2012 24.6462353943231 2013 21.8325711829946 2014 25.5337405289883 2015 19.5744830519437 2016 17.2885129384968 2017 18.4243617075084 2018 13.1944654716252 2019 12.1761128353156 2020 8.4023404177525 2021 8.50335308933635