Year % of GNI 1990 20.7771969806871 1991 24.9026097414748 1992 22.9805447224695 1993 24.3522639451684 1994 23.3569999457826 1995 18.7475891345747 1996 16.1345107901565 1997 15.3484975721336 1998 11.32313644694 1999 11.6566832017592 2000 16.1068246968884 2001 17.4074804163676 2002 19.0117501898883 2003 16.7132968709047 2004 16.5029092316798 2005 14.6497391056733 2006 17.5783032730834 2007 16.8501859546938 2008 22.3010996659883 2009 22.8144843788992 2010 22.0733491811039 2011 23.1607049982451 2012 22.2011809056773 2013 24.6962466912139 2014 24.8293201453149 2015 24.9758563237231 2016 22.4379317458101 2017 21.1228533404801 2018 19.0846947930134 2019 19.7012625858652 2020 19.8754101987493 2021 19.3303863019648