Year	2007 US$
1967	61260000
1968	63670000
1969	87860000
1970	83110000
1971	466200000
1972	502500000
1973	91830000
1974	70080000
1975	91100000
1976	101500000
1977	117700000
1978	145300000
1979	188600000
1980	179200000
1981	663900000
1982	615900000
1983	183900000
1984	731200000
1985	717000000
1986	703200000
1987	701800000
1988	781100000
1989	577000000
1990	695700000
1991	661800000
1992	645000000
1993	581400000
1994	443900000
1995	431100000
1996	461500000
1997	444900000
1998	415800000
1999	440400000
2000	565000000
2001	592300000
2002	673900000
2003	652700000
2004	641100000
2005	738900000
2006	832500000
2007	716400000