Year	current US$
1960	287000000
1961	346000000
1962	345000000
1963	374000000
1964	408000000
1965	403000000
1966	429000000
1967	439000000
1968	472000000
1969	474000000
1970	482000000
1971	527000000
1972	558000000
1973	699000000
1974	2036000000
1975	1771000000
1976	2214000000
1977	2180000000
1978	2040000000
1979	2610000000
1980	4077000000
1981	3761000000
1982	3072000000
1983	2353000000
1984	2173000000
1985	2139000000
1986	1386000000
1987	1462000000
1988	1412000000
1989	1578000000
1990	1960000000
1991	1985000000
1992	1691000000
1993	1662000000
1994	1868000000
1995	2454000000
1996	2500000000
1997	2543000000
1998	2258000000
1999	2804000000
2000	4274000000
2001	4280000000
2002	3880000000
2003	5178000000
2004	6517000000
2005	9942000000
2006	14155000000
2007	13396000000
2008	18650000000
2009	9126000000
2010	10982000000
2011	14944000000
2012	12983000000
2013	18745000000
2014	14530000000
2015	10748000000
2016	7633000000
2017	8741000000
2018	10532000000
2019	7192000000
2020	5519000000
2021	8620000000
2022	13286000000
2023	8925000000