Year	current US$
1970	147.410637007857
1971	456.828935566064
1972	495.045880183782
1973	742.583104622624
1974	2190982.82065581
1975	6992490.01197477
1976	22287342.5251789
1977	83204628.7261
1978	115571655.735815
1979	353251529.105395
1980	523859484.369557
1981	427093827.990339
1982	281105350.807331
1983	352531902.076029
1984	196545558.398631
1985	56387255.697301
1986	14364077.7694286
1987	17504058.9115642
1988	12867474.4466927
1989	19893777.0954236
1990	26362623.0569562
1991	11331741.8783669
1992	6943629.69085401
1993	5692223.53150731
1994	2212096.060728
1995	2100167.2317322
1996	4774643.56506257
1997	4677325.60729429
1998	1039402.40124595
1999	3014620.89161464
2000	5872706.62673175
2001	3614284.24860437
2002	2598047.75373961
2003	8742316.44940489
2004	6939855.55756985
2005	10178256.2619986
2006	4571930.14939705
2007	4712727.815076
2008	7016003.49699755
2009	3726530.93128274
2010	3674314.87749469
2011	5859547.51771354
2012	5982605.18784516
2013	5057908.00891639
2014	4621054.56769776
2015	1340304.9271086
2016	452833.455353042
2017	622809.655127379
2018	709581.866935656
2019	595154.946265086
2020	245658.087130859
2021	555844.143387235