Year	current US$
1970	13595813.7270924
1971	11440859.1416244
1972	11743762.8859126
1973	53958419.334082
1974	76849702.6065864
1975	14639658.5061275
1976	19876986.786883
1977	14492690.7824066
1978	10401292.7550942
1979	39347831.7818996
1980	58832577.863976
1981	18397743.2703908
1982	10090499.8307201
1983	9834185.08228693
1984	12968832.5899096
1985	3704724.20799816
1986	4155573.6171249
1987	11107202.8536592
1988	446021222.902732
1989	434763573.950097
1990	124268008.666667
1991	32412897.8593038
1992	47219096.1656473
1993	22836647.7128131
1994	53832198.9908194
1995	46569662.4409944
1996	28280846.2408487
1997	33454019.114869
1998	13271117.1092242
1999	16149162.5426832
2000	25856276.7100937
2001	9696010.88923293
2002	12946760.4543137
2003	8151017.24886008
2004	10661880.970921
2005	20676399.9196656
2006	78144648.6987225
2007	164682718.247982
2008	41030868.871201
2009	5479557.3505631
2010	102915075.676661
2011	171247874.162964
2012	240236476.44819
2013	161037521.944482
2014	146562444.994006
2015	86633141.1704796
2016	82752742.0886325
2017	174131043.106648
2018	235290790.688114
2019	130526147.189253
2020	108383695.433715
2021	550978388.03883