Year	US Dollars adjusted for inflation)
1960	145000000
1961	93000000
1962	60000000
1963	227000000
1964	260000000
1965	368000000
1966	757000000
1967	682000000
1968	289000000
1969	524000000
1970	145000000
1971	86000000
1972	68000000
1973	63000000
1974	55000000
1975	49000000
1976	35000000
1977	27000000
1978	24000000
1979	47000000
1980	254000000
1981	435000000
1982	457000000
1983	441000000
1984	337000000
1985	122000000
1986	141000000
1987	198000000
1988	308000000
1989	667000000
1990	369000000
1991	322000000
1992	253000000
1993	181000000
1994	93000000
1995	78000000
1996	151000000
1997	158000000
1998	152000000
1999	155000000
2000	229000000
2001	99000000
2002	90000000
2003	9000000
2004	6000000
2005	14000000
2006	557000000
2007	596000000
2008	603000000
2009	571000000
2010	150000000
2011	607000000
2012	147000000
2013	51000000
2014	16000000
2015	143000000
2016	142000000
2017	352000000
2018	527000000
2019	401000000
2020	427000000
2021	514000000
2022	848000000