Year	current US$
1960	389000000
1961	408000000
1962	361000000
1963	319000000
1964	413000000
1965	455000000
1966	493000000
1967	424000000
1968	404000000
1969	440000000
1970	509000000
1971	701000000
1972	705000000
1973	894000000
1974	2370000000
1975	4215000000
1976	3897000000
1977	3899000000
1978	4213000000
1979	7179000000
1980	13942000000
1981	20735000000
1982	21534000000
1983	12166000000
1984	11078000000
1985	10556000000
1986	10190000000
1987	7415000000
1988	10268000000
1989	9899000000
1990	6526000000
1991	423000000
1992	603000000
1993	533000000
1994	499000000
1995	665000000
1996	3532000000
1997	4419000000
1998	5983000000
1999	10917000000
2000	13210000000
2001	13120000000
2002	9817000000
2003	9934000000
2004	21302000000
2005	23532000000
2006	20892000000
2007	21516000000
2008	33000000000
2009	38437000000
2010	43915000000
2011	47803000000
2012	59006000000
2013	65104000000
2014	68618000000
2015	58517000000
2016	44116000000
2017	48506000000
2018	56876000000
2019	72283000000
2020	54722000000
2021	50707000000
2022	87216000000
2023	95519000000