Year	current US$
1960	24000000
1961	25000000
1962	29000000
1963	41000000
1964	35000000
1965	37000000
1966	41000000
1967	41000000
1968	40000000
1969	37000000
1970	40000000
1971	41000000
1972	44000000
1973	54000000
1974	86000000
1975	107000000
1976	86000000
1977	97000000
1978	131000000
1979	152000000
1980	226000000
1981	195000000
1982	257000000
1983	321000000
1984	390000000
1985	352000000
1986	275000000
1987	154000000
1988	173000000
1989	186000000
1990	216000000
1991	207000000
1992	191000000
1993	187000000
1994	182000000
1995	239000000
1996	281000000
1997	283000000
1998	252000000
1999	264000000
2000	272000000
2001	259000000
2002	242000000
2003	250000000
2004	278000000
2005	359000000
2006	510000000
2007	524000000
2008	488000000
2009	379000000
2010	429000000
2011	475000000
2012	565000000
2013	457000000
2014	474000000
2015	483000000
2016	517000000
2017	485000000
2018	448000000
2019	444000000
2020	345000000
2021	350000000
2022	498000000
2023	486000000