Year % of GNI 1976 14.849990756487065 1977 16.01546301452877 1978 15.74249268704566 1979 13.792708418548024 1980 14.21946852612569 1981 15.277153917977932 1982 16.05386542669134 1983 16.761872662110736 1984 18.554642747192872 1985 16.997622173249653 1986 19.157700743748187 1987 18.296124748079293 1988 17.18086698231944 1989 15.614890863938127 1990 17.19276545256236 1991 18.526123575992507 1992 17.991943180861377 1993 17.918924019563335 1994 20.079511827978667 1995 19.290673943922375 1996 16.885152334733483 1997 16.872060704923918 1998 17.863702663726393 1999 17.79870962448144 2000 17.44022093614612 2001 16.96350629383345 2002 18.001772556786758 2003 18.424201445946032 2004 17.82671737645696 2005 17.857123579974804 2006 18.808492288212708 2007 18.22285175405741