Year	current US$
1983	3630000000
1984	3201428571.4285717
1985	4830000000
1986	1952127659.5744681
1987	324299065.4205608
1988	4213714285.714286
1989	4964850947.229177
1990	8096982794.935899
1991	3029889879.3917146
1992	-3510854173.354249
1993	-5692332332.332333
1994	-7914860000
1995	-1059485000
1996	-1767000000
1997	-6485300000
1998	-7530100000
1999	-4900400000
2000	-1846455600
2001	3508536600
2002	14670786469.080223
2003	14311606659.199675
2004	11530324282.126127
2005	11805942344.43232
2006	13069507211.538462
2007	12594785132.709322
2008	13446803975.217789
2009	16864736858.957256
2010	12270934023.35185
2011	8971671281.270224
2012	10642160447.066128
2013	-549718918.4733328
2014	2127192190.9841151
2015	-6393090842.8054905
2016	-5796649660.273035
2017	-17049937664.175306
2018	-9914710860.213093
2019	14413857778.031073
2020	11599718810.118639
2021	14945195610.746992
2022	5986990475.169676
2023	-7257691282.182983