Year	US Dollars adjusted for inflation)
1960	2431000000
1961	936000000
1962	307000000
1963	450000000
1964	395000000
1965	212000000
1966	227000000
1967	145000000
1968	182000000
1969	2000000
1970	2000000
1971	2000000
1972	2000000
1973	3000000
1974	3000000
1975	3000000
1976	3000000
1977	75000000
1978	86000000
1979	10000000
1980	6000000
1981	2000000
1982	13000000
1983	25000000
1984	71000000
1985	113000000
1986	20000000
1987	56000000
1988	104000000
1989	199000000
1990	306000000
1991	477000000
1992	1211000000
1993	1243000000
1994	320000000
1995	716000000
1996	1511000000
1997	945000000
1998	401000000
1999	1746000000
2000	2517000000
2001	2805000000
2002	2865000000
2003	2325000000
2004	3225000000
2005	3481000000
2006	2840000000
2007	1642000000
2008	1808000000
2009	1403000000
2010	942000000
2011	1054000000
2012	1573000000
2013	1293000000
2014	1082000000
2015	1231000000
2016	1143000000
2017	1306000000
2018	2119000000
2019	1503000000
2020	884000000
2021	981000000
2022	807000000