Year	current US$
1967	699999.7200001121
1968	699999.7200001121
1969	839999.6640001344
1970	0
1971	-1398177.056753405
1972	-1300855.3123678819
1973	2882014.6435164036
1974	0
1975	-1352250.4151408772
1976	-2300000.5750001436
1977	-1150000.2875000718
1978	6900001.725000431
1979	7125696.091436933
1980	6166654.254950348
1981	6712592.592592593
2007	23462262.06875016
2008	28496277.12506974
2009	37614970.790710144
2010	43559277.57589005
2011	-69648342.26366754
2012	-5619897.710667316
2013	39626549.35124155
2014	114909004.76344225
2015	49483111.08509012
2016	45352898.86319903
2017	-119526462.45617148
2018	-115828099.68863359
2019	22544647.939876083
2020	40210643.288319744
2021	67541805.83676024
2022	7190112.533853629