Year	US Dollars adjusted for inflation)
1960	599000000
1961	575000000
1962	292000000
1963	376000000
1964	747000000
1965	667000000
1966	150000000
1967	290000000
1968	271000000
1969	447000000
1970	22000000
1971	237000000
1972	121000000
1973	393000000
1974	554000000
1975	495000000
1976	378000000
1977	394000000
1978	660000000
1979	485000000
1980	384000000
1981	143000000
1982	179000000
1983	173000000
1984	307000000
1985	229000000
1986	80000000
1987	77000000
1988	37000000
1989	65000000
1990	14000000
1991	22000000
1993	935000000
1994	2000000
1995	1000000
1996	156000000
1997	99000000
1998	45000000
1999	71000000
2000	14000000
2001	14000000
2004	72000000
2005	13000000
2006	253000000
2007	196000000
2008	5000000
2009	4000000
2010	18000000
2011	8000000
2013	2000000
2014	7000000
2016	14000000
2017	5000000
2018	27000000
2019	16000000
2020	55000000
2021	19000000
2022	59000000