Year	current US$
1970	7538489.55300227
1971	6644943.5585367
1972	7550527.37364008
1973	13066013.8852546
1974	14165976.9623141
1975	20011296.552441
1976	16723073.8708981
1977	28815977.3502837
1978	29574462.9196767
1979	34159416.249053
1980	40870649.6504453
1981	38932977.187627
1982	81715012.8643855
1983	28942901.439847
1984	17379483.3336837
1985	11375563.6953481
1986	11648087.159837
1987	12037701.0410353
1988	13196930.1382962
1989	14567105.027196
1990	40247181.9487574
1991	57857144.4049085
1992	45411434.2504925
1993	37404322.1926281
1994	43573633.4559369
1995	69522662.7396429
1996	48847237.293609
1997	83583786.0862056
1998	71426959.7891756
1999	62561707.563507
2000	58580201.0856149
2001	59666944.2749395
2002	57850095.1221917
2003	58937426.5919277
2004	59105738.6500585
2005	60471474.9917892
2006	86953698.8212737
2007	96262201.0503062
2008	106462575.856675
2009	101553887.443261
2010	189781530.559608
2011	168758321.812673
2012	164817422.686601
2013	206410550.692658
2014	238313745.426952
2015	199399182.122812
2016	247263947.49846
2017	221828700.112781
2018	172645123.046503
2019	151132102.249715
2020	187689099.681418
2021	153775541.09863