Year	current US$
1975	1072225243.504636
1976	1213380894.9858537
1977	1417267865.7010772
1978	1821826250.8977773
1979	2204661375.969662
1980	2676214097.448755
1981	2862846235.2049804
1982	2676589643.1486144
1983	2489351918.228819
1984	2389024383.751092
1985	2377666899.98689
1986	2644448922.8779397
1987	3414785311.574641
1988	3828162916.519893
1989	3986702456.3456297
1990	4619211641.291058
1991	3946561606.465814
1992	4405569242.167382
1993	4317346956.48277
1994	5319706531.594904
1995	7305893473.744138
1996	7041525046.761538
1997	6568706014.577178
1998	6017804120.537042
1999	6456312689.3041115
2000	7669505729.704359
2001	9150743655.197062
2002	6434793478.54083
2003	7615067364.608091
2004	9493897797.03427
2005	12148024927.916037
2006	11777098339.1236
2007	13985414284.8192
2008	23018116077.9418
2009	19766451451.32971
2010	20670005627.561253
2011	24073104713.183064
2012	24440706883.225636
2013	25248608391.04988
2014	25646788341.02318
2015	24110938651.49255
2016	25299661057.552673
2017	28746162202.08779
2018	31568056055.540314
2019	34261790440.124058
2020	29867250229.876682
2021	33712473868.5427
2022	34729010311.93196
2023	33702432361.20122