Year % of GNI 1970 5.7 1971 5.7 1972 5.7 1973 5.7 1974 5.7 1975 5.7 1976 5.7 1977 5.7 1978 5.7 1979 5.7 1980 5.7 1981 5.7 1982 5.7 1983 5.7 1984 5.7 1985 5.7 1986 5.7 1987 5.7 1988 5.7 1989 5.7 1990 5.7 1991 5.7 1992 5.7 1993 5.7 1994 5.7 1995 4.2740388 1996 4.2740388 1997 4.2740388 1998 4.2740388 1999 4.02669900000001 2000 3.77935919999999 2001 3.53201939999996 2002 3.28467960000003 2003 3.03733980000001 2004 2.79 2005 2.64285714285712 2006 2.49571428571427 2007 2.34857142857141 2008 2.20142857142855 2009 2.0542857142857 2010 1.90714285714284 2011 1.76 2012 1.76 2013 1.76 2014 1.76 2015 1.76 2016 1.76 2017 1.76 2018 1.76 2019 1.76 2020 1.76 2021 1.76