Year	current US$
1960	4000000
1961	7000000
1962	9000000
1963	7000000
1964	10000000
1965	13229999.5422363
1966	10939999.5803833
1967	10590000.1525879
1968	10850000.3814697
1969	12000000
1970	10000000
1971	11000000
1972	12000000
1973	11000000
1974	8000000
1975	8000000
1976	5000000
1977	6000000
1978	4000000
1979	5000000
1980	3000000
1981	5000000
1982	42000000
1983	200000000
1984	166000000
1985	199000000
1986	128000000
1987	160000000
1988	107000000
1989	144000000
1990	93000000
1991	61000000
1992	15000000
1993	21000000
1994	-4000000
1995	-19000000
1996	-44000000
1997	-32000000
1998	-25510000.2288818
1999	-34869998.9318848
2000	-30559999.4659424
2001	-29629999.1607666
2002	-23729999.5422363
2003	-21020000.4577637
2004	-15050000.1907349
2005	-12010000.2288818
2006	-9600000.38146973
2007	-2890000.10490417
2008	-119999.997317791
2009	-550000.011920929
2010	-389999.98569488496
2011	5369999.88555908
2012	5679999.82833862
2013	5949999.80926514
2014	9069999.69482422
2015	8520000.45776367
2016	8510000.22888184
2017	9539999.96185303
2018	10300000.1907349
2019	11090000.1525879
2020	24079999.9237061
2021	32479999.5422363
2022	37080001.8310547