Year	current US$
1971	793769.9556
1972	607909.739
1973	2062166.452
1974	4513935.089
1975	29322185.52
1976	47306022.402
1977	408370666.978
1978	581926128.415
1979	783067815.787
1980	1047147372.112
1981	1320461723.198
1982	2338251722.831
1983	2580209148.1959996
1984	2130181265.5860002
1985	2110681622.4799998
1986	2274972996.225
1987	2347583210.531
1988	2826638608.7660003
1989	2915041979.657
1990	3109971578.0550003
1991	3640387218.0420003
1992	4128993002.8499002
1993	5019496591.36
1994	6332859250.375999
1995	8359679943.835173
1996	9576014059.682518
1997	14235954483.022476
1998	8345711204.189094
1999	10428650049.931267
2000	12571307442.478638
2001	14199418748.304985
2002	17455884919.09944
2003	21171325185.210976
2004	25443568924.1877
2005	28817333406.432884
2006	32932715959.011677
2007	39711156211.719246
2008	45745388010.20222
2009	47928826184.21015
2010	56810739669.524315
2011	63095503861.52768
2012	66119261560.7299
2013	73297068095.12692
2014	89080014865.06989
2015	92438263586.03102
2016	88012194730.57349
2017	93353693573.07706
2018	94359742599.79166
2019	92845575939.29169
2020	90915989614.28062
2021	97796404567.26915
2022	106992459594.67664