Year	current US$
1960	454000000
1961	489000000
1962	551000000
1963	614000000
1964	685000000
1965	742000000
1966	890000000
1967	1067000000
1968	1159000000
1969	1248000000
1970	1299000000
1971	1288000000
1972	1484000000
1973	2049000000
1974	3143000000
1975	3280000000
1976	3572000000
1977	4617000000
1978	5356000000
1979	7158000000
1980	9214000000
1981	9955000000
1982	8548000000
1983	10287000000
1984	10398000000
1985	9242000000
1986	9178000000
1987	13000000000
1988	20285000000
1989	25770000000
1990	33045000000
1991	37569000000
1992	40686000000
1993	46077000000
1994	54459000000
1995	70786000000
1996	72332000000
1997	62854000000
1998	42971000000
1999	50350000000
2000	61923000000
2001	61962000000
2002	64645000000
2003	75824000000
2004	94410000000
2005	118178000000
2006	128773000000
2007	139966000000
2008	179225000000
2009	133709000000
2010	182921000000
2011	228787000000
2012	249115000000
2013	250407000000
2014	227749000000
2015	202653000000
2016	194198000000
2017	221519000000
2018	248201000000
2019	236260000000
2020	206156000000
2021	266882000000
2022	301030000000
2023	289754000000