Year	current US$
1970	20113.9438668676
1971	27633.948333855
1972	116658.60222944
1973	424744.316682666
1974	3434417.57970577
1975	4735036.60312756
1976	25600912.4413912
1977	51197006.7544359
1978	43148723.2956372
1979	48520218.5474121
1980	47078746.2968434
1981	44350737.2104796
1982	58589141.3865379
1983	71740036.3219442
1984	106538807.04936
1985	179730436.924192
1986	151883490.06049
1987	166982113.888146
1988	161620855.565494
1989	229970361.843067
1990	328604941.772539
1991	231184956.467988
1992	265161651.190453
1993	289264178.294208
1994	270628035.495205
1995	260505564.586749
1996	414526603.064977
1997	477738279.802144
1998	237835853.708277
1999	335059125.485341
2000	568911707.515854
2001	477051877.483848
2002	457710752.126295
2003	354189733.508145
2004	477170489.406601
2005	555169770.690388
2006	527398226.375469
2007	928820720.472
2008	1652838759.90526
2009	912157367.948574
2010	1260597735.44401
2011	1505346025.65468
2012	1315538752.71349
2013	1140991701.67815
2014	1311345699.71311
2015	827695113.005106
2016	610038969.290254
2017	688014991.509078
2018	856390591.802088
2019	833075884.695467
2020	529806861.841416
2021	885636290.976069