Year	US Dollars adjusted for inflation)
1960	302000000
1961	317000000
1962	378000000
1963	719000000
1964	910000000
1965	745000000
1966	183000000
1967	742000000
1968	266000000
1969	555000000
1970	699000000
1971	698000000
1972	662000000
1973	21000000
1974	40000000
1975	96000000
1976	266000000
1977	584000000
1978	699000000
1979	774000000
1980	621000000
1981	757000000
1982	1243000000
1983	1333000000
1984	1173000000
1985	892000000
1986	791000000
1987	614000000
1988	383000000
1989	694000000
1990	273000000
1991	322000000
1992	237000000
1993	140000000
1994	205000000
1995	82000000
1996	203000000
1997	126000000
1998	269000000
1999	278000000
2000	123000000
2001	164000000
2002	247000000
2003	128000000
2004	130000000
2005	86000000
2006	304000000
2007	217000000
2008	140000000
2009	266000000
2010	181000000
2011	119000000
2012	253000000
2013	450000000
2014	8000000
2015	59000000
2016	76000000
2017	36000000
2018	140000000
2019	494000000
2020	575000000
2021	652000000
2022	695000000