Year	current US$
1960	16000000
1961	17000000
1962	11000000
1963	9000000
1964	10000000
1965	8970000.26702881
1966	5800000.19073486
1967	4719999.79019165
1968	4619999.88555908
1970	-2000000
1971	-2000000
1972	1000000
1973	3000000
1974	4000000
1975	8000000
1976	-1000000
1977	4000000
1978	10000000
1979	23000000
1980	60000000
1981	64000000
1982	131000000
1983	158000000
1984	121000000
1985	346000000
1986	148000000
1987	103000000
1988	109000000
1989	110000000
1990	143000000
1991	85000000
1992	11000000
1993	21000000
1994	32000000
1995	8000000
1996	10000000
1997	17000000
1998	13199999.8092651
1999	71519996.6430664
2000	5210000.03814697
2001	17489999.7711182
2002	119580001.831055
2003	175410003.66210902
2004	377609985.35156304
2005	759039978.027344
2006	738780029.296875
2007	710450012.207031
2008	848159973.144531
2009	954640014.648438
2010	695859985.351563
2011	657859985.351563
2012	454329986.57226604
2013	713880004.882813
2014	255669998.168945
2015	271899993.89648396
2016	227580001.831055
2017	111169998.168945
2018	227089996.33789098
2019	275799987.792969
2020	229779998.779297
2021	734119995.117188
2022	578780029.296875