Year	current US$
1990	-136292058.689107
1991	-107198853.572957
1992	-176729545.101145
1993	-141987310.551676
1994	-119459641.161576
1995	-240821364.143496
1996	-196266770.143323
1997	-235293336.590408
1998	-191659752.817916
1999	-135093675.840958
2000	-188366600.208672
2001	-178028480.037126
2002	-158488208.798544
2003	-218839790.987283
2004	-191266545.648569
2005	-157947786.104421
2006	-188304382.423194
2007	-130361751.118369
2008	-165040358.522494
2009	-225964045.780895
2010	155285257.911943
2011	-426666671.463243
2012	-160531363.538649
2013	-1214310939.47356
2014	134817799.537764
2015	-674765159.100169
2016	-1102150182.26866
2017	-608096961.786988
2018	-813937426.943073
2019	-474170591.512089
2020	-384778400.127826