Year	current US$
1970	885150008.963421
1971	1020199996.9538301
1972	1140400007.933378
1973	1386830002.4513152
1974	2147470012.0184562
1975	2940029970.049858
1976	2693370015.233757
1977	3283450007.259844
1978	4345190023.49116
1979	5581549959.629776
1980	6278390019.893648
1981	6360829982.280732
1982	6348439976.200465
1983	5977569947.421553
1984	5971210036.75461
1985	6697089956.283569
1986	8398809951.126575
1987	9875549880.981445
1988	10961819976.348434
1989	11839979897.49909
1990	14076919950.105251
1991	14223239983.975891
1992	14687059996.485722
1993	13384439905.07722
1994	14445629894.718534
1995	14327890079.040083
1996	12052090070.798996
1997	10980530009.925365
1998	10464909940.600399
1999	9643790021.896364
2000	9818610052.108765
2001	10918170040.130613
2002	15587180160.52246
2003	22809709735.870373
2004	26383599842.07154
2005	50550050071.71633
2006	45387340217.59034
2007	40930239902.49636
2008	42294270004.27247
2009	39046519960.40347
2010	39666899871.82618
2011	41593890171.05104
2012	40751410029.41132
2013	40476800089.83616
2014	38651330417.156235
2015	37042489999.77113
2016	36323879716.873184
2017	41500759871.95973
2018	41128600370.88398
2019	43641699737.54887
2020	54058549952.507065
2021	50968409741.401726