Year	current US$
1970	4940000.05722046
1971	4050000.1907348596
1972	2390000.10490417
1973	1230000.01907349
1974	1090000.0333786
1975	1720000.02861023
1976	1620000.00476837
1977	1399999.97615814
1978	810000.002384186
1979	899999.976158142
1980	2230000.01907349
1981	3230000.01907349
1982	4039999.96185303
1983	4719999.79019165
1984	5320000.17166138
1985	6250000
1986	7139999.8664856
1987	7480000.01907349
1988	9489999.77111816
1989	14970000.2670288
1990	25489999.7711182
1991	13600000.3814697
1992	15720000.2670288
1993	20270000.4577637
1994	14850000.3814697
1995	13899999.6185303
1996	14500000
1997	12909999.8474121
1998	14420000.076293899
1999	11750000
2000	18870000.8392334
2001	22750000
2002	18309999.4659424
2003	21329999.9237061
2004	24540000.915527303
2005	23649999.6185303
2006	31129999.1607666
2007	33790000.9155273
2008	43299999.237060495
2009	48830001.8310547
2010	54319999.6948242
2011	52110000.6103516
2012	53563583.3740234
2013	56805549.621582
2014	56022209.1674805
2015	48947940.826416
2016	57924221.038818404
2017	55015888.2141113
2018	54351375.579834
2019	45546001.4343262
2020	41585998.5351563
2021	46895999.9084473
2022	50859001.159668