Year	current US$
1960	129000000
1961	175000000
1962	153000000
1963	165000000
1964	179000000
1965	191000000
1966	186000000
1967	159000000
1968	179000000
1969	200000000
1970	233000000
1971	206000000
1972	214000000
1973	322000000
1974	382000000
1975	384000000
1976	546000000
1977	608000000
1978	686000000
1979	788000000
1980	1059000000
1981	1215000000
1982	1023000000
1983	1045000000
1984	934000000
1985	909000000
1986	1088000000
1987	1189000000
1988	1405000000
1989	1598000000
1990	1693000000
1991	1605000000
1992	1703000000
1993	1645000000
1994	1913000000
1995	2106000000
1996	2397000000
1997	2726000000
1998	2771000000
1999	2237000000
2000	2295000000
2001	2060000000
2002	1861000000
2003	2206000000
2004	2931000000
2005	3422000000
2006	3989000000
2007	4518000000
2008	5942000000
2009	5405000000
2010	6724000000
2011	7912000000
2012	8709000000
2013	9067000000
2014	9132000000
2015	7688000000
2016	7043000000
2017	7888000000
2018	7498000000
2019	7680000000
2020	6864000000
2021	9535000000
2022	11184000000
2023	9193000000