Year	current US$
1990	926044573.895541
1991	521866889.611927
1992	848356324.518196
1993	984544714.461298
1994	554471054.126313
1995	-408769694.61465
1996	-269029927.565148
1997	-332118608.598098
1998	-342719598.360939
1999	-161571812.271799
2000	-181184930.184456
2001	188031127.179121
2002	-374800669.548268
2003	-191326165.753582
2004	128614992.921601
2005	-141890368.188263
2006	122847875.024644
2007	472088772.287476
2008	1089390102.51523
2009	20391648.5263625
2010	-36279752.0086133
2011	-122542659.427385
2012	-541129509.95899
2013	-1038556750.7196
2014	-259680299.607113
2015	-489995194.942021
2016	-97204347.5269865
2017	31121485.0636495
2018	892221664.765295
2019	645927889.922013
2020	-548476893.58182
2021	-462080478.551368