Year	current US$
1960	16000000
1961	17000000
1962	22000000
1963	25000000
1964	29000000
1965	34000000
1966	38000000
1967	46000000
1968	48000000
1969	50000000
1970	53000000
1971	61000000
1972	72000000
1973	95000000
1974	106000000
1975	128000000
1976	129000000
1977	160000000
1978	179000000
1979	275000000
1980	328000000
1981	294000000
1982	278000000
1983	265000000
1984	274000000
1985	296000000
1986	360000000
1987	507000000
1988	519000000
1989	399000000
1990	445000000
1991	408000000
1992	456000000
1993	346000000
1994	363000000
1995	434000000
1996	469000000
1997	397000000
1998	409000000
1999	409000000
2000	365000000
2001	324000000
2002	387000000
2003	460000000
2004	546000000
2005	593000000
2006	660000000
2007	757000000
2008	895000000
2009	742000000
2010	808000000
2011	915000000
2012	861000000
2013	955000000
2014	867000000
2015	667000000
2016	734000000
2017	760000000
2018	829000000
2019	986000000
2020	957000000
2021	1066000000
2022	891000000
2023	905000000