Year	US Dollars adjusted for inflation)
1971	10000000
1972	2000000
1973	76000000
1974	44000000
1975	39000000
1976	70000000
1977	62000000
1978	45000000
1979	1000000
1980	55000000
1981	62000000
1982	128000000
1983	109000000
1984	59000000
1985	81000000
1986	4000000
1987	1000000
1988	242000000
1989	302000000
1990	188000000
1991	79000000
1992	113000000
1993	47000000
1994	61000000
1995	119000000
1996	7000000
1997	26000000
1998	1000000
1999	186000000
2000	203000000
2001	279000000
2002	33000000
2003	8000000
2004	32000000
2005	10000000
2006	221000000
2007	88000000
2008	12000000
2010	36000000
2011	117000000
2012	184000000
2013	650000000
2014	203000000
2015	636000000
2016	449000000
2017	331000000
2018	155000000
2019	714000000
2020	59000000
2021	73000000
2022	184000000