Year	current US$
1960	9000000
1961	16000000
1962	137000000
1963	374000000
1964	700000000
1965	790000000
1966	995000000
1967	1168000000
1968	1871000000
1969	2164000000
1970	2357000000
1971	2694000000
1972	2938000000
1973	4003000000
1974	8259000000
1975	6834000000
1976	9554000000
1977	11411000000
1978	9895000000
1979	16076000000
1980	21910000000
1981	15571000000
1982	13203000000
1983	12216000000
1984	11148000000
1985	12314000000
1986	8215000000
1987	8043000000
1988	6673000000
1989	8034000000
1990	13225000000
1991	11235000000
1992	9942000000
1993	8590000000
1994	8954000000
1995	8975000000
1996	9903000000
1997	9656000000
1998	6659000000
1999	7947000000
2000	12038000000
2001	10634000000
2002	9851000000
2003	12878000000
2004	17425000000
2005	28849000000
2006	37473000000
2007	46929000000
2008	61950000000
2009	37055000000
2010	48935000000
2011	19060000000
2012	61026000000
2013	46018000000
2014	20826000000
2015	11392000000
2016	6764000000
2017	18865000000
2018	29830000000
2019	29058000000
2020	9312000000
2021	33417000000
2022	37686000000
2023	35270000000