Year	US Dollars adjusted for inflation)
1960	285000000
1961	35000000
1962	47000000
1963	12000000
1964	68000000
1965	387000000
1966	619000000
1967	412000000
1968	730000000
1969	657000000
1970	893000000
1971	1296000000
1972	1242000000
1973	665000000
1974	516000000
1975	669000000
1976	588000000
1977	231000000
1978	618000000
1979	561000000
1980	950000000
1981	660000000
1982	1511000000
1983	1764000000
1984	1936000000
1985	1296000000
1986	1868000000
1987	2622000000
1988	1428000000
1989	1046000000
1990	949000000
1991	1313000000
1992	675000000
1993	1415000000
1994	1077000000
1995	1009000000
1996	766000000
1997	427000000
1998	350000000
1999	329000000
2000	310000000
2001	514000000
2002	527000000
2003	704000000
2004	411000000
2005	337000000
2006	722000000
2007	510000000
2008	607000000
2009	1133000000
2010	1472000000
2011	1266000000
2012	1520000000
2013	2059000000
2014	1308000000
2015	1800000000
2016	2449000000
2017	1617000000
2018	1372000000
2019	1585000000
2020	704000000
2021	1462000000
2022	2017000000