Year	current US$
1977	364100000
1978	487700000
1979	413500000
1980	335000000
1981	673900000
1982	611400000
1983	697700000
1984	706900000
1985	739200000
1986	507700000
1987	506000000
1988	494500000
1989	603300000
1990	702300000
1991	792300000
1992	911500000
1993	1279000000
1994	1450000000
1995	1358000000
1996	1378000000
1997	1302000000
1998	1299000000
1999	1416000000
2000	1468000000
2001	1494000000
2002	1675000000
2003	1697000000
2004	2071000000
2005	2274000000
2006	2437000000
2007	2916511531.21551
2008	3096166633.0555
2009	2623215491.67501
2010	3436767267.8579082