Year	current US$
1984	260289327.094388
1985	270112426.628045
1986	299236494.311359
1987	247958929.213605
1988	182850841.882526
1989	288040942.532753
1990	81033606.996262
1991	-305237285.031759
1992	-195322461.990547
1993	-43331134.4307861
1994	-184122935.112749
1995	106150956.83688
1996	164838665.476347
1997	-143173174.419883
1998	167729773.304961
1999	149360419.710162
2000	542221920.924392
2001	729606189.948549
2002	656876365.62254
2003	894945701.666868
2004	1355721080.01826
2005	1588389956.10113
2006	1684891170.29388
2007	1267897441.87268
2008	728022679.082113
2009	591419089.713418
2010	889360130.700036
2011	873491921.814885
2012	646116484.629143
2013	438119364.820818
2014	189456900.415236
2015	-17209217.4116395
2016	28424331.1983354
2017	-65089614.1175404
2018	-26329031.6578794
2019	-369432572.210619
2020	-497451938.233258
2021	457580112.396767