Year % of GNI 1990 2.66868757300055 1991 2.74972619345364 1992 2.76592739854315 1993 2.47292455263044 1994 2.20562299781867 1995 2.21636508760793 1996 2.04199004576294 1997 2.13715841226417 1998 2.93885188475282 1999 2.73690163112064 2000 2.59841723627414 2001 2.78973334123771 2002 3.02433736965535 2003 3.09812889999466 2004 2.59538814248105 2005 2.70946501569177 2006 2.29472456673027 2007 1.85789263669366 2008 0.987454517532975 2009 0.747378171757607 2010 0.644106792114175 2011 0.494962768840301 2012 0.660812329547057 2013 0.751920209397103 2014 0.944190050101304 2015 1.09349103584203 2016 1.34473828063088 2017 2.03434662879444 2018 1.9809477846587 2019 2.25550436955916 2020 2.34048555016466 2021 2.76605220486749