Year	current US$
1975	9818467.44632571
1976	9043322.40259079
1977	10645179.1753682
1978	17398105.6667843
1979	20786075.7607523
1980	27957626.5566285
1981	37693944.7626042
1982	30377784.881586097
1983	29428196.7665666
1984	30305049.24645025
1985	33766292.23980437
1986	30203847.2610015
1987	34293558.5182719
1988	43889204.5681907
1989	49885714.90866271
1990	55560315.56677459
1991	65273045.40012889
1992	60517058.8436187
1993	78613853.10356371
1994	104303441.08182308
1995	75927067.73540032
1996	79520893.16132477
1997	102772664.80282833
1998	53575331.397861
1999	86004095.92526047
2000	70112959.22178814
2001	79834255.63706766
2002	48541462.95135442
2003	61923987.78458623
2004	42452541.93215012
2005	56564907.6146644
2006	66324199.023877494
2007	94759129.19945101
2008	111240330.45679669
2009	100957419.76278955
2010	179539345.71746615
2011	183436126.69882366
2012	188270057.0317275
2013	235255879.7918319
2014	216987906.17978135
2015	176175117.84304017
2016	196740126.37783352
2017	202248776.1995406
2018	197090318.7208735
2019	231736098.6782824
2020	128817235.24247909
2021	135974460.95377672
2022	189958882.50791442
2023	226957529.4974355