Year	US Dollars adjusted for inflation)
1960	42000000
1961	69000000
1962	88000000
1963	181000000
1964	85000000
1965	214000000
1966	594000000
1967	153000000
1968	418000000
1969	559000000
1970	423000000
1971	553000000
1972	664000000
1973	162000000
1974	225000000
1975	229000000
1976	274000000
1977	264000000
1978	649000000
1979	690000000
1980	854000000
1981	485000000
1982	537000000
1983	777000000
1984	856000000
1985	747000000
1986	280000000
1987	616000000
1988	411000000
1989	962000000
1990	623000000
1991	498000000
1992	352000000
1993	972000000
1994	862000000
1995	365000000
1996	500000000
1997	692000000
1998	699000000
1999	868000000
2000	176000000
2001	412000000
2002	559000000
2003	645000000
2004	465000000
2005	431000000
2006	324000000
2007	694000000
2008	1073000000
2009	1192000000
2010	2231000000
2011	1146000000
2012	1024000000
2013	1105000000
2014	860000000
2015	771000000
2016	830000000
2017	868000000
2018	886000000
2019	733000000
2020	688000000
2021	1180000000
2022	1565000000