Year	US Dollars adjusted for inflation)
1960	103000000
1961	95000000
1962	47000000
1963	107000000
1964	248000000
1965	639000000
1966	1126000000
1967	1089000000
1968	1168000000
1969	893000000
1970	1199000000
1971	1182000000
1972	1315000000
1973	1283000000
1974	851000000
1975	485000000
1976	42000000
1977	42000000
1978	227000000
1979	1249000000
1980	1017000000
1981	1080000000
1982	532000000
1983	916000000
1984	557000000
1985	28000000
1986	78000000
1987	50000000
1988	65000000
1989	128000000
1990	116000000
1995	281000000
1996	213000000
1997	110000000
1998	220000000
1999	164000000
2000	7000000
2001	95000000
2002	58000000
2003	22000000
2004	294000000
2005	221000000
2006	42000000
2007	8000000
2008	182000000
2009	60000000
2010	150000000
2011	1010000000
2012	780000000
2013	360000000
2014	1209000000
2015	851000000
2016	907000000
2017	781000000
2018	603000000
2019	160000000
2020	32000000
2021	244000000
2022	95000000