Year	current US$
1987	38067567567.567566
1988	40424528301.886795
1989	41450777202.07254
1990	38247882300.49041
1991	28850634899.856003
1992	25121666666.666668
1993	26361160449.970394
1994	30072805104.25415
1995	37430162102.612526
1996	36937074278.300354
1997	35575214078.24284
1998	41696091973.707634
1999	35953156753.73903
2000	37253739511.12733
2001	40395116581.48316
2002	46065502702.581696
2003	57806384143.16596
2004	74973656851.80765
2005	98454380120.07607
2006	122023735992.70625
2007	174588782938.583
2008	214317202478.26596
2009	174102268534.83966
2010	170029359010.66742
2011	192613579705.88544
2012	179132893143.41733
2013	189789258566.2443
2014	199713780259.3176
2015	177883883008.74738
2016	185287630540.43143
2017	210147163769.8483
2018	243316029944.05597
2019	251017797625.017
2020	251362514349.69714
2021	285810244501.93335
2022	298891515898.0265
2023	351002579629.6701