Year	US Dollars adjusted for inflation)
1960	171000000
1961	1576000000
1962	1219000000
1963	1009000000
1964	740000000
1965	563000000
1966	306000000
1967	237000000
1968	336000000
1969	516000000
1970	623000000
1971	455000000
1972	376000000
1973	78000000
1974	224000000
1975	195000000
1976	53000000
1977	90000000
1978	130000000
1979	190000000
1980	441000000
1981	452000000
1982	276000000
1983	649000000
1984	646000000
1985	848000000
1986	810000000
1987	787000000
1988	712000000
1989	37000000
1990	150000000
1991	752000000
1992	407000000
1993	196000000
1994	473000000
1995	405000000
1996	419000000
1997	351000000
1998	115000000
1999	192000000
2000	576000000
2001	538000000
2002	436000000
2003	153000000
2004	353000000
2005	118000000
2006	113000000
2007	481000000
2008	423000000
2009	104000000
2010	241000000
2011	356000000
2012	207000000
2013	202000000
2014	316000000
2015	408000000
2016	252000000
2017	369000000
2018	184000000
2019	178000000
2020	220000000
2021	256000000
2022	155000000