Year	current US$
1981	-1197733594.5263398
1982	-1873066429.74239
1983	-1847128737.2836003
1984	-335522752.41892964
1985	420840045.28964967
1986	813055441.9000825
1987	-103675612.8244928
1988	291312180.91769606
1989	-874773749.0582165
1990	-2088987379.9387095
1991	-1185671234.082132
1992	-2073581706.5616324
1993	-3634585116.6832023
1994	-3200846888.691736
1995	-4603360361.309453
1996	-5756364749.142702
1997	-6640475322.946641
1998	-3324942722.5408716
1999	-290471113.04993534
2000	1284389810.4305618
2001	-2043575087.3656178
2002	-3231875065.923253
2003	-2580367583.6687016
2004	-3298092120.6574945
2005	-1488407058.2504735
2006	2093993160.5383945
2007	3717625648.0968103
2008	-1757044418.7263365
2009	-787556697.0991925
2010	-738915840.738694
2011	-6054453160.48108
2012	-7616276874.582853
2013	-9851262392.603718
2014	-8208058289.425013
2015	-14481031085.09271
2016	-26860444593.904415
2017	-29772797714.136974
2018	-40706015493.692444
2019	-45505202473.72262
2020	-28085930915.49718
2021	-47213793709.16802
2022	-63301036886.851456
2023	-61590587933.06813