Year	current US$
1967	8947037.023086473
1968	10102406.605685057
1969	10390807.953824567
1970	7600853.676273581
1971	7629745.90423351
1972	7542030.302892151
1973	6283842.854769672
1974	7896814.032705008
1975	16805336.9629173
1976	10048103.939052748
1977	12216308.709315475
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	-23265911.194197416
1986	-44748227.855797686
1987	16876319.361103225
1988	8969585.94874123
1989	49475713.482927285
1990	41021390.17697727
1991	-36639429.48664189
1992	47101698.85466154
1993	-75033640.65631002
1994	-19399145.716159433
1995	-28337490.33999759
1996	-80687834.48062205
1997	-39044343.75562883
1998	60624092.198044494
1999	54103073.76282511
2000	-14570779.877342887
2001	114677974.82535216
2002	-56574890.8518361
2003	86944163.81148069
2004	78638363.78863719
2005	40035401.012691
2006	68046049.61711058
2007	275358786.9879238
2008	106753353.41505046
2009	182975129.55013195
2010	347536366.53935164
2011	138635947.9804616
2012	294169298.90311146
2013	290727089.11396134
2014	323324820.31203467
2015	315201814.5622011
2016	754231800.5204862
2017	513115536.84685487
2018	300517515.40739864
2019	430127607.6201694
2020	-593428666.146947
2021	316610673.16068673
2022	-184582295.41828
2023	-395248010.0341772