Year	US Dollars adjusted for inflation)
1960	44000000
1962	10000000
1963	34000000
1964	46000000
1965	25000000
1966	8000000
1968	104000000
1969	97000000
1970	54000000
1971	109000000
1972	30000000
1974	5000000
1975	77000000
1976	230000000
1977	490000000
1978	487000000
1979	198000000
1980	35000000
1981	13000000
1982	176000000
1983	288000000
1984	494000000
1985	621000000
1986	168000000
1987	50000000
1988	7000000
1989	134000000
1990	327000000
1991	516000000
1992	896000000
1993	694000000
1994	36000000
1995	635000000
1996	1189000000
1997	478000000
1998	46000000
1999	198000000
2000	227000000
2001	67000000
2002	23000000
2003	43000000
2004	2000000
2005	12000000
2006	5000000
2007	288000000
2008	5000000
2009	9000000
2010	85000000
2011	113000000
2012	31000000
2013	73000000
2014	692000000
2015	331000000
2016	159000000
2017	114000000
2018	96000000
2019	55000000
2020	66000000
2021	904000000
2022	2249000000