Year	current US$
1960	847000000
1961	793000000
1962	798000000
1963	910000000
1964	1074000000
1965	1007000000
1966	1076000000
1967	993000000
1968	1010000000
1969	1211000000
1970	1223000000
1971	1361000000
1972	1792000000
1973	2596000000
1974	2435000000
1975	2162000000
1976	2795000000
1977	3196000000
1978	3738000000
1979	4706000000
1980	5421000000
1981	5622000000
1982	5571000000
1983	5414000000
1984	5518000000
1985	5720000000
1986	5880000000
1987	7195000000
1988	8850000000
1989	8876000000
1990	9394000000
1991	9619000000
1992	9785000000
1993	10542000000
1994	12184000000
1995	13645000000
1996	14362000000
1997	14223000000
1998	12084000000
1999	12474000000
2000	13297000000
2001	13730000000
2002	14383000000
2003	16527000000
2004	20344000000
2005	21730000000
2006	22409000000
2007	26943000000
2008	30580000000
2009	24933000000
2010	31396000000
2011	37669000000
2012	37305000000
2013	39445000000
2014	41622000000
2015	34355000000
2016	33756000000
2017	38075000000
2018	39673000000
2019	39517000000
2020	38377000000
2021	44777000000
2022	45102000000
2023	41483000000