Year	current US$
1970	789999.995380641
1971	919999.9757111066
1972	1009999.9979138379
1973	1350000.0163912764
1974	3990000.085905194
1975	7910000.007599594
1976	1849999.9865889547
1977	7010000.001639132
1978	9439999.964088194
1979	11959999.959915876
1980	19850000.16540289
1981	35010000.06310642
1982	49980000.52943826
1983	45549999.0899116
1984	40299999.324604854
1985	32200000.47795476
1986	24580000.024288878
1987	29729999.393224742
1988	35630000.2112985
1989	60209999.0174174
1990	62320000.70065265
1991	40519999.55810608
1992	56849999.51347704
1993	42580000.33907591
1994	59929999.89353119
1995	54290000.85592274
1996	52649999.624118194
1997	43579999.396577455
1998	32119999.703019857
1999	30040000.1835078
2000	31029999.518767
2001	20780000.098049633
2002	24249999.830499277
2003	26049999.743700035
2004	28270000.133663394
2005	24599999.925121672
2006	33060000.129044063
2007	48219999.494031064
2008	54469999.37295912
2009	80370000.2264231
2010	119529999.82982871
2011	254320000.5888939
2012	224279998.742044
2013	218490000.88870525
2014	109879998.96332622
2015	66369999.30627644
2016	51740000.287070855
2017	110119999.6788055
2018	49250000.2495944
2019	46690000.36083164