Year % of GNI 1976 34.0383940470118 1977 32.762627840381 1978 30.3709905513037 1979 25.4461752656833 1980 23.1919421674957 1981 20.3549315076925 1982 19.531707885895 1983 19.6541570640908 1984 18.5845262730536 1985 18.6889360303565 1986 15.4828490506947 1987 15.9386012226418 1988 18.410053657159 1989 14.8758589776361 1990 16.7796436464598 1991 13.9942999702469 1992 13.9105200293942 1993 16.4589610718344 1994 15.8763404426322 1995 16.8159013272578 1996 17.4835419835293 1997 17.0257625640378 1998 16.5394780825706 1999 14.0312889140363 2000 14.7604401633969 2001 14.6349221695948 2002 22.4844277033786 2003 22.6459704750227 2004 15.5057969262885 2005 15.4661208344062 2006 22.1466790602906 2007 22.8298235396866 2008 21.6625917465831 2009 18.9022195572135 2010 17.9432661836076 2011 17.8432311123855 2012 16.6024808058107 2013 15.5274874483463 2014 16.2419215544016 2015 14.5787445031001 2016 14.9515917433589 2017 13.4111539778791 2018 11.8154986312032 2019 14.2505602710508 2020 17.4729809527572 2021 21.9951323120705