Year	current US$
1970	12684628.27489
1971	14367508.523297
1972	20086210.7613571
1973	25355389.4966977
1974	23410315.7360093
1975	29560945.9485766
1976	59043753.0956917
1977	58314243.53731
1978	71424054.3582305
1979	81385083.5144466
1980	88028052.2567849
1981	80354569.8317633
1982	70209836.5000117
1983	54377350.5982366
1984	54245304.6963002
1985	54577892.9282248
1986	56419659.1227893
1987	59722313.863143
1988	71056441.6687391
1989	66562076.0495859
1990	79289151.1121914
1991	83424854.9157028
1992	83707705.2886738
1993	66690018.4951581
1994	52602488.3612549
1995	62510239.8862574
1996	73303309.5166997
1997	66619977.1821527
1998	77356220.5278436
1999	68703042.9895456
2000	66009883.936306
2001	84127667.2729759
2002	164826426.888419
2003	261970619.952326
2004	339672240.087612
2005	457551357.753946
2006	536629209.823669
2007	656991765.508157
2008	835082153.483084
2009	879869463.062889
2010	894615572.558094
2011	1209452780.07025
2012	1322401194.96191
2013	1445625549.49249
2014	1412098145.1619
2015	1193272760.11765
2016	1311410840.93393
2017	1619440785.11288
2018	1376671460.17375
2019	1443608169.89674
2020	1358945384.72852
2021	1484977222.47288