Year	US Dollars adjusted for inflation)
1960	931000000
1961	978000000
1962	1015000000
1963	1297000000
1964	1487000000
1965	1268000000
1966	1769000000
1967	1627000000
1968	1554000000
1969	1561000000
1970	1734000000
1971	2315000000
1972	2646000000
1973	2948000000
1974	2145000000
1975	2293000000
1976	2032000000
1977	2703000000
1978	3253000000
1979	2937000000
1980	3812000000
1981	3727000000
1982	3798000000
1983	3446000000
1984	2958000000
1985	4015000000
1986	2979000000
1987	1752000000
1988	1938000000
1989	2288000000
1990	1820000000
1991	1191000000
1992	1206000000
1993	961000000
1994	857000000
1995	954000000
1996	1857000000
1997	3194000000
1998	3127000000
1999	1762000000
2000	1023000000
2001	1378000000
2002	1387000000
2003	1365000000
2004	2150000000
2005	1664000000
2006	1502000000
2007	2168000000
2008	1884000000
2009	1863000000
2010	864000000
2011	2234000000
2012	1308000000
2013	1780000000
2014	1755000000
2015	2263000000
2016	2155000000
2017	2355000000
2018	1998000000
2019	3612000000
2020	2378000000
2021	3853000000
2022	3021000000