Year % of GNI 1990 2.1758124592238 1991 2.02777843699307 1992 1.86643736821339 1993 1.79972482543827 1994 1.72739538403977 1995 1.60302012050474 1996 1.47101226961201 1997 1.38491160705795 1998 1.27805534928081 1999 1.23215516618392 2000 1.1102525818522 2001 1.06370696197153 2002 1.05121922221922 2003 1.06993176719386 2004 1.04186423439895 2005 0.99835461531435 2006 0.932017866863394 2007 0.842912995210222 2008 0.765816469475188 2009 0.766376737300073 2010 0.763371725739365 2011 0.756380876418913 2012 0.751687397601374 2013 0.739495531856647 2014 0.730586222127072 2015 0.738128849305683 2016 0.721469078703694 2017 0.700899933990208 2018 0.685952887717532 2019 0.67480722601473 2020 0.671443763795316 2021 0.674687618384119