Year	current US$
1975	1563686.3463804163
1976	-34950.50714896737
1977	349301.3972055888
1978	2007096.2572965547
1979	1361055.22021015
1980	542017.7636073787
1981	780280.3953114226
1982	1183690.0294147478
1983	1490990.9909909908
1984	254497.58666081616
1985	1875829.317689783
1986	1105614.973262032
1987	-244363.53451897495
1988	2489105.3576006154
1989	254270.9574890743
1990	547924.0623553017
1991	1827086.22551288
1992	2598173.8549476652
1993	3161127.1676300582
1994	-1024844.7204968943
1995	1227476.591391927
1996	1390534.9460183457
1997	-3392956.0743965176
1998	1056970.509383378
1999	-499132.2049575833
2000	1090226.4583990448
2001	551094.2434512213
2002	637537.6010474389
2003	639078.7718901901
2004	729675.8131556731
2005	878006.2478879198
2006	899642.0944691399
2007	945589.5291576328
2008	1165588.8499102462
2009	1157406.2975560222
2010	1817836.8337859996
2011	30364612.018075857
2012	6761333.198028003
2013	5782187.172138452
2014	4410957.316787185
2015	8948522.834995786
2016	2073003.8262861576
2017	5533984.491452929
2018	10233003.796180481
2019	5174042.373008181
2020	6297001.8791012
2021	-5977395.995899759