Year	current US$
1965	360296.2962962963
1967	-96000
1968	-41142.857142857145
1969	-57142.857142857145
1970	1296000
1971	6418285.714285715
1972	-5142857.142857143
1973	-1225851.5982305752
1974	-8458412.698412698
1975	-7060317.46031746
1981	33343333.333333332
1982	-6844444.444444444
1983	38052716.51425497
1984	7727006.933422438
1985	-5103985.417184522
1986	-28073924.84890952
1987	12415021.042408546
1988	-811994.7291570212
1989	-1147056.4137470298
1990	-7993927.184607749
1991	-5696561.678777829
1992	4829503.175662377
1993	4126853.3772652387
1994	209765.5770730182
1995	-795970.4994434612
1996	-1350289.0173410405
2005	-1117113.0797364549
2006	16553876.019829782
2007	5424797.549692311
2008	1611835.8570458812
2009	10688727.587597003
2010	14224947.156601187
2011	20122390.455781687
2012	34999620.8853605
2013	29419503.368649848
2014	-5411567.952696395
2015	-5047858.906279532
2016	-4396230.661046986
2017	-4849044.899076408
2018	492.6012722379561
2019	-257.67105834297854
2020	448.29499078530546
2021	277.5885724143164
2022	333.8841695993001
2023	264.2157237894207