Year	current US$
1974	8724384.19017283
1975	13065009.152505519
1976	9625424.75430078
1977	4477374.639442617
1978	34565913.77684586
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	-9090672.590934696
1990	-37096240.2967805
1991	23749861.439940844
1992	29846032.14060265
1993	14832468.382059764
1994	27377290.050875217
1995	48081890.57577035
1996	27172190.346158653
1997	14734369.169537306
1998	45766452.69013726
1999	27945970.41114123
2000	55335903.387072206
2001	2457681.1440065526
2002	26235624.883075785
2003	21383091.981511917
2004	28634384.55734215
2005	167225417.72182378
2006	236387715.47624603
2007	207918908.04483607
2008	294251094.0262447
2009	142534419.41075158
2010	1105827294.335115
2011	465463426.0938938
2012	1002365384.4054327
2013	461633.67802037444
2014	-355046436.7673778
2015	-151530233.25772664
2016	-716508737.3579139
2017	1092325792.906304
2018	469991777.340399
2019	-30110806.93676603
2020	54571438.418991596
2021	-23984245.775413815
2022	45655402.16592832
2023	46949258.50194659