Year	current US$
1990	31025065046.7823
1991	28626470606.2552
1992	30892070655.7757
1993	36568734608.8092
1994	51780302050.1584
1995	46225008967.9346
1996	54507067202.8812
1997	44403879073.8971
1998	37571806026.9152
1999	4276739631.16818
2000	10399376943.6816
2001	3798663139.59508
2002	9219324086.55029
2003	15763201178.8536
2004	38518083763.9822
2005	46022997903.006
2006	69100331595.7391
2007	104118808862.887
2008	112079475386.201
2009	53573092497.7503
2010	76291807232.522
2011	68771712694.6999
2012	-7781721302.16666
2013	6968232644.90903
2014	-45389867852.369
2015	-70773293081.7212
2016	-88913050456.7667
2017	-70249900899.187
2018	-84405874127.9112
2019	-88271764390.5935
2020	-18610685957.414
2021	-1270040437.85342