Year	current US$
1972	930000.007152557
1973	1399999.97615814
1974	2259999.99046326
1975	4349999.90463257
1976	2059999.94277954
1977	3569999.9332428
1978	4150000.09536743
1979	4840000.15258789
1980	4070000.1716613797
1981	3720000.02861023
1982	3180000.0667572
1983	3869999.8855590797
1984	3750000
1985	3769999.98092651
1986	3349999.90463257
1987	3910000.08583069
1988	3980000.01907349
1989	3509999.99046326
1990	5750000
1991	4210000.03814697
1992	7880000.11444092
1993	5670000.07629395
1994	5130000.11444092
1995	6300000.19073486
1996	6650000.09536743
1997	6070000.17166138
1998	5610000.1335144
1999	5710000.03814697
2000	4260000.228881841
2001	4159999.8474121103
2002	4630000.11444092
2003	4730000.01907349
2004	5900000.09536743
2005	4289999.96185303
2006	7340000.15258789
2007	6289999.96185303
2008	7619999.88555908
2009	10340000.1525879
2010	17760000.2288818
2011	11710000.038146999
2012	17780000.6866455
2013	22040000.915527303
2014	21139999.3896484
2015	13800000.1907349
2016	14789999.961853001
2017	15500000
2018	20239999.7711182
2019	14789999.961853001
2020	20059999.4659424
2021	25620000.8392334
2022	15800000.1907349