Year	current US$
1978	-7511472.78308863
1979	4956039.94557993
1980	15396743.6051931
1981	26967071.7907311
1982	23316026.5650883
1983	-1232057.08494479
1984	3790020.7779857
1985	28038241.9587606
1986	36569125.4393584
1987	71297593.8271712
1988	54318207.0431312
1989	22158916.3510568
1990	37907045.9792911
1991	-9456124.45253399
1992	6484178.56617285
1993	-86123527.2462715
1994	-103298729.962677
1995	-18063359.1903284
1996	-131432467.796336
1997	-40711176.3707053
2003	-19068014.6914187
2004	-67773451.5620302
2005	-96328567.2354781
2006	-21025933.6625459
2007	-60494690.3544185
2008	-230359731.046961
2009	-149738520.72151
2010	-255845317.516911
2011	-170659409.60258
2012	-44038695.8898563
2013	-176276662.327596
2014	-81699736.6258534
2015	10161051.192567
2016	19286786.7037328
2017	10903456.0659475
2018	-14535593.7530932
2019	19046404.565805
2020	182861606.115175
2021	406380057.924259