Year	current US$
1970	61151.796855207
1971	20636186.8416963
1972	20813425.0377983
1973	23364720.7419348
1974	54435937.7529325
1975	207589880.001832
1976	235953829.819067
1977	243525360.322138
1978	200875210.431991
1979	200964989.32923
1980	281892703.824469
1981	502614272.935691
1982	541767991.861304
1983	291554261.788867
1984	193463860.994698
1985	224444762.019829
1986	108720392.667333
1987	61710668.8492861
1988	62769191.9937985
1989	82616126.3384667
1990	158383094.860529
1991	137317791.989809
1992	95384248.9493543
1993	49521085.0272341
1994	36083405.5372637
1995	62242541.0272862
1996	61221512.6303179
1997	46269419.3404935
1998	38870423.6510997
1999	23510325.46048
2000	53723925.7835119
2001	105950904.955924
2002	68896112.5608344
2003	75479342.8875051
2004	283254301.859736
2005	263585343.17844
2006	287436277.590833
2007	336601999.704288
2008	1008212653.6818
2009	349738024.041725
2010	516300885.022796
2011	658965522.684229
2012	328899553.640673
2013	179714744.497545
2014	148132636.17234
2015	93081480.749987
2016	87149615.3215447
2017	115012939.633677
2018	137625752.374351
2019	94219683.5169319
2020	55705738.1294349
2021	128944504.360686