Year	current US$
1971	430000.00715255697
1972	59999.9986588955
1974	19999.9995529652
1977	1139999.98569489
1978	1960000.03814697
1979	4880000.11444092
1980	5880000.11444092
1981	6800000.19073486
1982	1740000.0095367401
1983	2140000.10490417
1984	6809999.94277954
1985	2809999.94277954
1986	7150000.09536743
1987	5000000
1988	8720000.26702881
1989	9159999.84741211
1990	8300000.19073486
1991	7239999.771118159
1992	4659999.84741211
1993	19040000.915527303
1994	10340000.1525879
1995	22579999.9237061
1996	2670000.07629395
1997	64790000.9155273
1998	29090000.1525879
1999	17430000.3051758
2000	4440000.05722046
2001	-150000.005960464
2002	-910000.026226044
2003	-1690000.0572204601
2004	3529999.97138977
2005	17600000.3814697
2006	27510000.2288818
2007	34709999.0844727
2008	30579999.9237061
2009	32290000.915527303
2010	39279998.779296905
2011	15319999.6948242
2012	300000.011920929
2013	13920000.076293899
2014	36290000.9155273
2015	6289999.96185303
2016	2650000.09536743
2017	18229999.5422363
2018	1399999.97615814
2019	4840000.15258789
2020	5190000.05722046
2021	6269999.98092651
2022	2160000.08583069