Year	current US$
1981	1820000.05245209
1982	2589999.91416931
1983	980000.019073486
1984	-319999.99284744303
1985	1259999.9904632599
1986	500000
1987	2539999.96185303
1988	-1360000.01430511
1989	-1509999.9904632599
1990	-600000.023841858
1991	-1080000.04291534
1992	-1059999.9427795399
1993	-1080000.04291534
1994	-1110000.01430511
1995	-1200000.04768372
1996	1879999.99523163
1997	3579999.92370605
1998	-1200000.04768372
1999	3569999.9332428
2000	1419999.95708466
2001	4550000.19073486
2002	1110000.01430511
2003	200000.00298023198
2004	379999.99523162795
2005	-1629999.99523163
2007	-250000
2008	7260000.228881841
2009	419999.986886978
2010	2660000.08583069
2011	2039999.96185303
2012	-1750000
2013	879999.995231628
2014	2069999.9332428002
2015	3507400.0358581496
2016	7572820.18661499
2017	10138580.3222656
2018	30427820.205688503
2019	8469869.61364746
2020	-4428500.17547607