Year	US Dollars adjusted for inflation)
1960	28000000
1961	52000000
1962	108000000
1963	108000000
1964	93000000
1965	87000000
1966	58000000
1967	140000000
1968	88000000
1969	124000000
1970	250000000
1971	243000000
1972	147000000
1973	338000000
1974	113000000
1975	87000000
1976	148000000
1977	104000000
1978	191000000
1979	306000000
1980	322000000
1981	350000000
1982	82000000
1983	254000000
1984	351000000
1985	188000000
1986	162000000
1987	534000000
1988	618000000
1989	285000000
1990	235000000
1991	580000000
1992	426000000
1993	183000000
1994	610000000
1995	530000000
1996	734000000
1997	935000000
1998	76000000
1999	172000000
2000	85000000
2001	116000000
2002	152000000
2003	131000000
2004	120000000
2005	115000000
2006	99000000
2007	8000000
2008	16000000
2009	63000000
2010	60000000
2011	249000000
2012	278000000
2013	378000000
2014	105000000
2015	180000000
2016	342000000
2017	326000000
2018	634000000
2019	278000000
2020	145000000
2021	146000000
2022	113000000