Year	current US$
1970	828.4216803359594
1971	874.0663355958976
1972	975.7588008759548
1973	1143.6202030952775
1974	1245.3612249014268
1975	1560.1121535752195
1976	1726.5594484530257
1977	2037.8973369781231
1978	2558.7402553293828
1979	3195.552585747692
1980	3948.4031261497635
1981	3898.243037439052
1982	3788.0506324064586
1983	3527.040000139942
1984	3332.885356822563
1985	3322.4212829917033
1986	4194.653939248319
1987	5083.669139206303
1988	5814.364771305233
1989	6040.609862259446
1990	7191.9236025961745
1991	7558.2773825748545
1992	8220.245517679401
1993	7296.310143553886
1994	8000.518004522321
1995	9857.479482056102
1996	10062.732327599339
1997	9909.89593415228
1998	10409.308733097778
1999	10633.603104904958
2000	10432.328062167977
2001	10402.233331361535
2002	11289.88974471661
2003	13669.497217166063
2004	15197.056610121028
2005	15888.172456599501
2006	16723.884273535623
2007	19485.87115293238
2008	22205.356770930368
2009	21083.277052836293
2010	21798.914293591537
2011	23155.103527089028
2012	22526.537020863198
2013	24769.59622871213
2014	26753.27338308136
2015	24921.714176998194
2016	25623.941632059727
2017	28813.185339651158
2018	31785.88483009166
2019	31751.181175636924
2020	29592.571484071843
2021	34951.708167997145
2022	34563.39662702318
2023	37882.26518568161