Year	current US$
1989	23257894736.842106
1990	20952380952.380955
1991	21794871794.871796
1992	26936857562.408226
1993	23619941556.716553
1994	16902734936.024761
1995	11378474000.21756
1996	8964349436.913115
1997	9221349678.61981
1998	7766349627.807974
1999	7253703744.05451
2000	7984400668.133148
2001	9113940544.66596
2002	10740008917.466501
2003	12710662990.221817
2004	19163000564.015793
2005	20809100344.6231
2006	24389702970.29703
2007	33189108910.89109
2008	37133813067.6499
2009	18779680769.68493
2010	21966094979.874966
2011	24470845100.314865
2012	21468324041.872456
2013	15656824721.631428
2014	13204383166.035133
2015	12127199011.86091
2016	13816851989.019438
2017	13652155466.753916
2018	12904545991.300451
2019	10529456302.969145
2020	11619687327.367306
2021	26261564046.192013
2022	-7116191049.109615
2023	-10359572040.583323