Year % of GNI 1970 6.2794088 1971 6.2794088 1972 4.5 1973 6.2794088 1974 6.2794088 1975 6.2794088 1976 6.2 1977 6.9 1978 6.9 1979 6.9 1980 6.9 1981 6.9 1982 6.9 1983 6.9 1984 6.9 1985 6.9 1986 6.9 1987 6.9 1988 6.9 1989 6.9 1990 6.9 1991 6.9 1992 6.9 1993 6.9 1994 6.9 1995 6.9 1996 6.9 1997 6.9 1998 6.9 1999 6.9 2000 6.9 2001 6.9 2002 6.9 2003 6.9 2004 6.9 2005 6.9 2006 6.9 2007 6.9 2008 6.9 2009 6.9 2010 6.9 2011 6.9 2012 6.9 2013 6.9 2014 6.9 2015 6.9 2016 6.9 2017 6.9 2018 6.9 2019 6.9 2020 6.9 2021 6.9