Year	current US$
1970	3759999.99046326
1971	4320000.17166138
1972	4190000.05722046
1973	4039999.96185303
1974	3470000.02861023
1975	4019999.98092651
1976	3660000.08583069
1977	4059999.94277954
1978	5380000.11444092
1979	6789999.96185303
1980	6179999.82833862
1981	6699999.80926514
1982	4469999.79019165
1983	2529999.97138977
1984	2329999.92370605
1985	2210000.03814697
1986	3019999.98092651
1987	2859999.89509583
1988	6219999.90940094
1989	6899999.856948851
1990	7230000.019073489
1991	5090000.033378601
1992	5009999.97928738
1993	5660000.037401915
1994	6510000.044479974
1995	10329999.931156643
1996	22100000.038743027
1997	29230000.108480446
1998	33210000.246763248
1999	35860000.28252602
2000	19940000.17642976
2001	19849999.889731396
2002	18790000.07361174
2003	22780000.03099442
2004	26059999.980032437
2005	27220000.14781952
2006	34399999.916553505
2007	33380000.293254867
2008	37759999.75204466
2009	38630000.41246414
2010	36299999.7138977
2011	25279999.554157257
2012	23362627.282738686
2013	24282350.13782977
2014	20073721.12572193
2015	18378853.574395172
2016	13946158.79654884
2017	12513175.20067096
2018	8126188.635826105
2019	8820023.715496063
2020	9856173.470616339
2021	12843206.703662878
2022	17630248.87442588