Year % of GNI 1990 1.24637998628459 1991 0.571599571479383 1992 0.543791336942024 1993 0.55787261188787 1994 0.543591437075989 1995 0.632738412441201 1996 0.770923623078891 1997 0.635890646330114 1998 0.178546540266743 1999 0.663313997908547 2000 1.42545019345214 2001 1.11909396659621 2002 0.954022462008177 2003 0.911920175709395 2004 0.933545901061436 2005 0.99360504439877 2006 0.953656787884643 2007 0.861550654669772 2008 0.953222849348561 2009 0.582971057081757 2010 0.616456716938427 2011 0.923988873565311 2012 0.833241769452533 2013 0.674665253485934 2014 0.582752214875627 2015 0.360540198229026 2016 0.31270290026627 2017 0.402399785871238 2018 0.658180369708939 2019 0.515174521131171 2020 0.292100099087634 2021 0.672071495838844