Year	current US$
1970	9000000
1971	15000000
1972	11000000
1973	8000000
1974	11000000
1975	15000000
1976	15000000
1977	16000000
1978	29000000
1979	29000000
1980	21000000
1981	69000000
1982	117000000
1983	126000000
1984	126000000
1985	139000000
1986	136000000
1987	117000000
1988	84000000
1989	116000000
1990	101000000
1991	66000000
1992	89000000
1993	78000000
1994	57000000
1995	45000000
1996	11000000
1997	-3000000
1998	400000.12889502826
1999	719999.5759873858
2000	-11809999.844059382
2001	10149999.871850006
2002	3010000.571608481
2003	16980000.244453542
2004	42089999.38517818
2005	45290001.01238489
2006	38559999.38398596
2007	9449999.229982462
2008	26019999.651238304
2009	27339999.813586522
2010	21449999.358504973
2011	19650000.09909268
2012	20040000.898763493
2013	23200000.377371863
2014	21630000.133067396
2015	21239999.718964092
2016	23960000.388324235
2017	33450000.103563115
2018	40159999.97220931
2019	27210000.87819998
2020	19649999.879300617
2021	38589999.29390845
2022	47949999.72917139