Year	current US$
1960	242000000
1961	249000000
1962	285000000
1963	324000000
1964	322000000
1965	377000000
1966	463000000
1967	593000000
1968	611000000
1969	646000000
1970	625000000
1971	652000000
1972	797000000
1973	1049000000
1974	1554000000
1975	2388000000
1976	3327000000
1977	4846000000
1978	4598000000
1979	5201000000
1980	6530000000
1981	6978000000
1982	8282000000
1983	7373000000
1984	6896000000
1985	6005000000
1986	5717000000
1987	5493000000
1988	6143000000
1989	6295000000
1990	3972000000
1991	4761000000
1992	7261000000
1993	7036000000
1994	6697000000
1995	7790000000
1996	8373000000
1997	8246000000
1998	8619000000
1999	7617000000
2000	7157000000
2001	7869000000
2002	9001000000
2003	10987000000
2004	12631000000
2005	15801000000
2006	17243000000
2007	21362000000
2008	24840000000
2009	19892000000
2010	22675000000
2011	25090000000
2012	27259000000
2013	29299000000
2014	31021000000
2015	30963000000
2016	30825000000
2017	33573000000
2018	35864000000
2019	33574000000
2020	27738000000
2021	31889000000
2022	34568000000
2023	37378000000