Year % of GNI 1995 31.3163300239644 1996 25.1671383454329 1997 24.6880207369006 1998 27.1760350050488 1999 21.1746907833488 2000 24.0274924471299 2001 19.8116932422172 2002 13.1100302835643 2003 15.053036255472 2004 17.8319241609019 2005 -2.09937949492103 2006 13.6898840045964 2007 3.41819953709345 2008 16.001393385517 2009 11.5704539788309 2010 4.95049504950495 2011 -1.375653961136 2012 6.0292408119467 2013 7.26833725592748 2014 10.9851193034226 2015 15.5288064046293 2016 16.0886226581087 2017 14.9808942736209 2018 12.0006985278832 2019 16.1414994040816 2020 5.53569236790034 2021 15.4157755415471