Year	current US$
1970	-657873400
1971	-799136000
1972	-940170199.3704093
1973	-1153937032.5693607
1974	-1318322926.8292685
1975	-1505098536.585366
1976	-1594581973.2034106
1977	-1641618313.2530122
1978	-2058740779.2207792
1979	-2268138219.1780825
1980	-2295740833.3333335
1981	-2340543975.9036145
1982	-2412947058.8235292
1983	-2541022933.6437716
1984	-2837376778.5998864
1985	-2582425264.766896
1986	-2918851691.8646507
1987	-2777825257.5352917
1988	-3043123878.6279683
1989	-3675379469.4348326
1990	-3046844015.9574466
1991	-1734684045.31186
1992	-289398378.3783784
1993	-565312297.2972974
1994	-368823783.7837838
1995	-762386441.9762543
1996	-500000000
1997	-737200000
1998	-1029300000
1999	-792500000
2000	-860700000
2001	-916300000
2002	-562700000
2003	-245300000
2004	279700000
2005	1140600000
2006	116666666.66666666
2007	1467870370.3703704
2008	-2129351851.8518517
2009	1152777777.7777777
2010	2887962962.9629626
2011	2240000000
2012	3771000000
2013	2991000000
2014	3947000000
2015	2336000000
2016	2464000000
2017	2789000000
2018	1963000000
2019	1661000000
2020	702000000