Year	US Dollars adjusted for inflation)
1960	1000000
1961	5000000
1962	6000000
1963	6000000
1964	7000000
1965	21000000
1966	21000000
1967	7000000
1968	7000000
1969	6000000
1970	70000000
1971	140000000
1972	4000000
1973	4000000
1974	84000000
1975	267000000
1976	46000000
1977	25000000
1978	38000000
1979	18000000
1980	10000000
1981	132000000
1982	260000000
1983	370000000
1984	244000000
1985	93000000
1986	198000000
1987	158000000
1988	143000000
1989	177000000
1990	117000000
1991	105000000
1992	71000000
1993	104000000
1994	254000000
1995	89000000
1996	113000000
1997	634000000
1998	174000000
1999	46000000
2000	47000000
2001	8000000
2002	18000000
2003	99000000
2004	54000000
2005	113000000
2006	898000000
2007	628000000
2008	626000000
2009	984000000
2010	273000000
2011	997000000
2012	266000000
2013	450000000
2014	962000000
2015	977000000
2016	480000000
2017	820000000
2018	705000000
2019	308000000
2020	971000000
2021	594000000
2022	950000000