Year	current US$
1973	4270000
1974	5040000
1975	6340000
1976	6490000
1977	11511471.2600475
1978	9260279.58014836
1979	12147892.9278338
1980	18439443.9208727
1981	13800012.3387457
1982	13071864.4729483
1983	9972347.79882987
1984	5399604.19139533
1985	8500984.1827768
1986	7748927.86809047
1987	13712559.8320305
1988	8707284.78960046
1989	12114849.8436145
1990	16638359.4343515
1991	27650738.7889971
1992	31257754.1765782
1993	35650570.8278653
1994	30154867.7421851
1995	27095250.0267567
1996	21760021.4542903
1997	26323862.5814947
1998	21589896.3694093
1999	30345524.7319827
2000	43752074.0468578
2001	37133887.9198106
2002	69794569.4340033
2003	67387801.9996701
2004	34591085.9657841
2005	56244154.2963725
2006	112923278.381745
2007	40768609.3993161
2008	63833877.5195002
2009	190546677.641739
2010	255584702.553665
2011	279115073.987237
2012	308093541.248072
2013	425902438.873118
2014	465010215.592435
2015	536145674.407411
2016	523503786.87859
2017	545203276.387118
2018	549521831.728019
2019	580545515.11504
2020	559681941.832234
2021	702584737.676732
2022	638960849.807493