Year	current US$
1970	6289999.736472973
1971	22459999.311715323
1972	-6519999.774172895
1973	8600000.208243728
1974	-8159999.839961525
1975	-6389999.978244301
1976	9059999.730437992
1977	-8980000.263080006
1978	130000.0138580802
1979	820000.0170618293
1980	2169999.9757111087
1981	2060000.0470876698
1982	27189999.997615848
1983	6319999.925792213
1984	32230000.53316354
1985	44909999.66487285
1986	40369999.496266216
1987	23099999.60660937
1988	27490000.247955326
1989	30280000.56743625
1990	136820000.052452
1991	104539998.71946879
1992	169070003.64735726
1993	34009999.27707013
1994	24909999.160096046
1995	16739999.75249172
1996	8060000.367462616
1997	-4020000.198855996
1998	-349999.98845160427
1999	1809999.9725818594
2000	-469999.7454881703
2001	-779999.9322742219
2002	-8869999.825954432
2003	-3779999.9285489325
2004	-2750000.1452863207
2005	-12610000.11861325
2006	-17509999.942034442
2007	-6620000.004768372
2008	6980000.1569092255
2009	-7139999.806880947
2010	-11739999.890327439
2011	-319999.96304511325
2012	-909999.9554455238
2013	690000.0423192959
2014	2460000.222548848
2015	2799999.9411404133
2016	72329997.61402613
2017	117569999.82334673
2018	64859998.907893926
2019	44809999.10831457
2020	47260001.420974724
2021	28799999.728798907
2022	45959999.20368187