Year	US Dollars adjusted for inflation)
1960	526000000
1961	321000000
1962	122000000
1963	162000000
1964	1300000000
1965	378000000
1966	106000000
1967	98000000
1968	123000000
1969	64000000
1970	44000000
1971	57000000
1972	33000000
1973	51000000
1974	46000000
1975	45000000
1976	196000000
1977	204000000
1978	241000000
1979	107000000
1980	70000000
1981	106000000
1982	142000000
1983	108000000
1984	73000000
1985	20000000
1986	100000000
1987	84000000
1988	133000000
1989	107000000
1990	65000000
1991	948000000
1992	424000000
1993	96000000
1994	80000000
1995	97000000
1996	64000000
1997	223000000
1998	171000000
1999	105000000
2000	98000000
2001	61000000
2002	38000000
2003	55000000
2004	93000000
2005	2000000
2006	68000000
2007	75000000
2008	4000000
2009	74000000
2010	106000000
2011	43000000
2012	87000000
2013	107000000
2014	17000000
2015	44000000
2016	47000000
2017	85000000
2018	193000000
2019	94000000
2020	215000000
2021	41000000
2022	22000000