Year % of GNI 1976 21.331724871652224 1977 30.629880344841226 1978 27.22117832814273 1979 29.10324005909477 1980 19.711279268753607 1981 11.862334074661238 1982 12.414158073580445 1983 15.13640749241552 1984 18.469640686651005 1985 12.812946881095549 1986 15.870506612349507 1987 14.19851014547478 1988 19.061061964182958 1989 11.424880679648282 1990 17.80520381287507 1991 21.836236848865376 1992 22.81792918466006 1993 27.908952313411 1994 30.29679521886888 1995 37.28892000059381 1996 28.782729745789045 1997 15.873491416448807 1998 19.79645377798717 1999 20.566346224854627 2000 34.62928244559036 2001 30.846091148612114 2002 24.808850570442644 2003 34.41667110564564 2004 33.568365147905446