Year	current US$
1975	37816576.02345949
1976	-41235325.99383882
1977	-66105726.84333226
1978	10976432.325099524
1979	-43633017.205611095
1980	-10924172.27883958
1981	27456012.60237594
1982	-100592351.43886556
1983	-63514671.697780244
1984	7566738.9374758685
1985	126044407.18404964
1986	103774827.85606885
1987	145449869.88991103
1988	222171608.96711123
1989	200085727.06165007
1990	99271320.94431147
1991	366986650.9754452
1992	322771239.877394
1993	139098557.74999982
1994	839481634.6348372
1995	344501842.22964025
1996	395452013.3269156
1997	224283112.64516938
1998	361510175.47061205
2012	2468378501.910859
2013	2563392971.5858693
2014	1506836708.18195
2015	1323847082.9024076
2016	1790105780.6899202
2017	2064954851.2285469
2018	2444248830.318632
2019	2732894451.1174517
2020	3102113515.7767477
2021	3222725079.3329144
2022	3059138622.879836