Year	current US$
1970	258798017.34820324
1971	952521847.690387
1972	1168247011.952191
1973	-3253224842.2451015
1974	-7493364096.457279
1975	145868920.52194545
1976	-2478057687.83438
1977	2446631555.848146
1978	6582594113.620808
1979	4173132137.0309954
1980	-12410859145.37644
1981	-8404464316.130132
1982	-5419292770.221904
1983	2109484956.654768
1984	-1867307692.3076923
1985	-1862996653.4834197
1986	7969577867.255487
1987	3267109351.658201
1988	400105623.3263909
1989	-180646344.90544736
1990	2328492243.0510664
1991	2412450444.8259954
1992	589693637.077769
1993	32363681555.309464
1994	36132880643.611916
1995	42997622726.73244
1996	59461663947.797714
1997	46087085038.65393
1998	38522805843.648964
1999	22302224792.973053
2000	9745313088.47061
2001	14754690399.960648
2002	9665276392.470606
2003	7186714435.529397
2004	10646435537.567595
2005	-1836401651.050583
2006	-16009763919.176449
2007	-7510630798.313749
2008	-18482248598.04687
2009	-13649201302.226553
2010	-39690631283.33341
2011	-32143587482.490337
2012	23035104576.914066
2013	51382761948.3923
2014	62601879658.58801
2015	55352377649.10153
2016	61721471023.54101
2017	56171927914.47076
2018	50280791591.21565
2019	66893079858.823425
2020	68286765471.59552
2021	46499671838.75894
2022	-33687236543.5799
2023	31147240336.078983