Year	current US$
1988	397715472481.82764
1989	330680813439.4341
1990	360122792937.3997
1991	328674074074.07404
1992	236215496368.03873
1993	284031709791.98376
1994	276157060611.9413
1995	281481891682.3568
1996	280142812548.7748
1997	307018150388.9369
1998	206470891293.14786
1999	133456539398.8627
2000	159146818343.4056
2001	201810078848.13162
2002	238727272727.2727
2003	295148332506.57135
2004	398399861159.3197
2005	510464374725.86523
2006	654986117076.1251
2007	858791021172.2874
2008	1108262122591.4507
2009	922157210703.1685
2010	1070689245540.894
2011	1391441206131.261
2012	1532868322138.341
2013	1646931646883.904
2014	1478336390233.134
2015	960507994646.9875
2016	915631134384.4847
2017	1119066943666.2803
2018	1128248068280.5725
2019	1180107565831.3127
2020	1067052190122.7584
2021	1236291703267.8335
2022	1489606284546.4626
2023	1380140073728.6514